WP/03/200
IMF Working Paper
The Effects of Exchange Rate
Fluctuations on Output and Prices:
Evidence from Developing Countries
Magda Kandil and Ida Aghdas Mirzaie
INTERNATIONAL MONETARY FUND
© 2003 International Monetary Fund
WP/03/200
IMF Working Paper
IMF Institute
The Effects of Exchange Rate Fluctuations on Ontput and Prices: Evidence from
Developing Countries
Prepared by Magda Kandil and Ida Aghdas Mirzaie
I
Authorized for distribution by Samir El-Khouri
October 2003
Abstract
The views expresseu in this Working Paper are those of the author(s) and do not necessarily
represent those of the IMF or IMF policy. Working Papers describe research in progress by the
author(s) and are published to elicit comments and to further debate.
The paper examines the effects of exchange rate fluctuations on real output and the price
level in a sample of 33 developing countries. The theoretical model decomposes movements
in the exchange rate into anticipated and unanticipated components. Unanticipated currency
fluctuations help to determine aggregate demand through exports, imports, and the demand
for domestic currency, and aggregate supply through the cost of imported intermediate
goods. Anticipated exchange rate depreciation, through the supply channel, has limited
effects on output growth and inflation. Unanticipated currency fluctuations appear more
significant, with varying effects on output growth and price inflation across developing
countries.
JEL Classification Numbers: F41, F43, E31
Keywords: exchange rate, anticipated vs. unanticipated appreciation, supply vs. demand
channels, real and inflationary effects
Authors' E-Mail Addresses: mkandi1@imf,org; imirzaie@icu.edu
Magda Kandil is a Senior Economist in the IMF Institute. Ida Mirzaie is Assistant
Professor, Department of Economics and Finance, John Carroll University. The authors
would like to thank Ralph Chami, Samir El-Khouri, Yuko Kinoshita, Jacques Miniane,
Mika Saito, Sunil Sharma, Gabriel Srour, Danyang Xie, and participants in an IMF Institute
departmental seminar for helpful comments.
I
-2-
Contents
Page
I. Introduction ......................................................................................................................... 3
II. Theoretical Background .....................................................................................................
A. Aggregate Demand .................................................................................................
B. Aggregate Supply ...................................................................................................
C. Market Equilibrium ................................................................................................
5
6
8
9
III. Empirical Models ............................................................................................................ 10
IV. Empirical Results ............................................................................................................ 14
A. Fluctuations in the Face of Policy Shifts .............................................................. 14
B. Fluctuations in the Face of Aggregate Demand Shifts .......................................... 15
V. Summary and Conclusion ................................................................................................ 16
Appendixes
I. Econometric Methodology ................................................................................................ 27
II. Data Sources .................................................................................................................... 28
References ............................................................................................................................ 29
Tables
1. Summary of Parameter Estimates for the Output Equation in 33 Developing Countries:
Results of the Model Using Government Spending and the Money Supply .................. 19
2. Summary of Parameter Estimates for the Price Equation in 33 Developing Countries:
Results of the Model Using Government Spending and the Money Supply .................. 21
3. Summary of Parameter Estimates for the Output Equation in 33 Developing Countries:
Results of the Model Using Nominal GOP ................................................................... 23
4. Summary of Parameter Estimates for the Price Equation in 33 Developing Countries:
Results of the Model Using Nominal GOP ................................................................... 25
-3I. INTRODUCTION
There has been an ongoing debate on the appropriate exchange rate policy in developing
countries. The debate focuses on the degree of fluctuations in the exchange rate in
the face of internal and external shocks. Exchange rate fluctuations are likely, in tum, to
determine economic performance. In judging the desirability of exchange rate fluctuations, it
becomes, therefore, necessary to evaluate their effects on output growth and price inflation.
Demand and supply channels determine these effects.
A depreciation (or devaluation) of the domestic currency may stimulate economic activity
through the initial increase in the price of foreign goods relative to home goods. By
increasing the international competitiveness of domestic industries, exchange rate
depreciation diverts spending from foreign goods to domestic goods. As illustrated in Guitian
(1976) and Dornbusch (1988), the success of currency depreciation in promoting trade
balance largely depends on switching demand in the proper direction and amount, as well as
on the capacity of the home economy to meet the additional demand by supplying more
2
goods
While the traditional view indicates that currency depreciation is expansionary, the new
structuralism school stresses some contractionary effects. Meade (1951) discusses this
theoretical possibility. If the Marshall-Lerner condition is not satisfied, currency
depreciation could produce contraction. Hirschman (1949) points out that currency
depreciation from an initial trade deficit reduces real national income and may lead to a fall
in aggregate demand. Currency depreciation gives with one hand, by lowering export prices,
while taking away with the other hand, by raising import prices. Iftrade is in balance and the
terms of trade are not changed, these price changes offset each other. But if imports exceed
exports, the net result is a reduction in real income within the country. Cooper (1971)
confirms this point in a general-equilibrium model.
Diaz-Alejandro (1963) introduced another argument for contraction following devaluation.
Depreciation may raise the windfall profits in export and import-competing industries. If
money wages lag the price increase and ifthe marginal propensity to save from profits is
higher than that from wages, national savings will go up and real output will decrease.
Krugman and Taylor (1978), and Barbone and Rivera-Batiz (1987) have formalized the same
views.
Supply-side channels further complicate the effects of currency depreciation on economic
performance. Bruno (1979) and van Wijnbergen (1989) postulate that in a typical semiEmpirical support of this proposition for the Group of7 major industrial countries over the
1960-89 period is provided in Mendoza (1992).
2
The Marshall-Lerner condition states that devaluation will improve the trade balance ifthe
devaluing nation's demand elasticity for imports plus the foreign demand elasticity for the
nation's exports exceed 1.
3
-4 industrialized country where inputs for manufacturing are largely imported and cannot be
easily produced domestically, firms' input cost will increase following a devaluation. As a
result, the negative impact from the higher cost of imported inputs may dominate the
production stimulus from lower relative prices for domestically traded goods. Gylfason and
Schmid (1983) provide evidence that the fmal effect depends on the magnitude by which
4
demand and supply curves shift because of devaluation.
To summarize, currency depreciation increases net exports and increases the cost of
production. Similarly, currency appreciation decreases net exports and the cost of production.
The combined effects that occur through demand and supply channels determine the net
results of exchange rate fluctuations on real output and price.'
This paper revisits the relationship between exchange rate fluctuations and economic activity
in developing countries. The contribution of the theory is in treating the process of forming
rational forecasts of the exchange rate. Recent experiences of currency crises have brought to
the forefront the importance of anchoring agents' forecasts in the design of an appropriate
exchange rate policy. Hence, the theory aims to separate the effects of anticipated shifts in
the exchange rate from unanticipated deviations around agents' forecasts. The theoretical
investigation introduces a model that decomposes movements in the exchange rate into
anticipated and unanticipated components using rational expectations. Anticipated movement
in the exchange rate is assumed to vary with agents' observations of macroeconomic
fundamentals, which determine changes in the exchange rate over time. Deviation in the
realized exchange rate from its anticipated value captures the unanticipated component of the
exchange rate.
In this context, the output supplied varies with unanticipated price movements and the cost of
the output produced. Anticipated exchange rate movements determine the cost of the output
produced. In contrast, unanticipated exchange rate movements determine economic
conditions in three directions: net exports, money demand, and the output supplied.
The solution ofthe model demonstrates the effects occuring through demand and supply
channels on the output and price responses to unanticipated changes in the exchange rate.
Based on theory's solutions, empirical models are formulated for output and price. The
models incorporate demand and supply shifts as well as exchange rate shifts. Exchange rate
Hanson (1983) provides theoretical evidence that the effect of currency depreciation on
output depends on the assumptions regarding the labor market. Solimano (1986) studies the
effect of devaluation by focusing on the structure of the trade sector. Agenor (1991)
introduces a theoretical model for a small, open economy and distinguishes between
anticipated and unanticipated movement in the exchange rate. Examples of empirical
investigations include Edwards (1986), Gylfason and Radetzki (1991), Roger and Wang
(1995), Hoffrnaister and Vegh (1996), Bahmani (1998), Kamin and Rogers (2000), and
Kandil and Mirzaie (2002 and 2003).
4
5
For an analytical overview, see Lizondo and Montiel (1989).
-5fluctuations are assumed to be randomly distributed around a steady-state stochastic trend
over time. Positive shocks to the exchange rate indicate an unanticipated increase in the
foreign-currency price of domestic currency-that is, unanticipated currency appreciation.
Similarly, negative shocks indicate unanticipated depreciation of the exchange rate.
The data under investigation are for a sample of33 developing countries. The real exchange
rate is constructed by multiplying the value of each country's currency in terms of the U.S.
dollar by the relative price between the two countries. Hence, the real exchange rate accounts
for the relative prices in the domestic economy relative to foreign prices in the largest
economy of the world. The relative price channel is important to the analysis of exchange
rate fluctuations, given the high inflationary experience in developing countries.
Accordingly, the empirical investigation will combine the nominal exchange rate policy with
movements in domestic price inflation relative to that of a major international price to
determine the implications of fluctuations in the real exchange rate on economic performance
in developing countries.
The results clearly illustrate the different effects of anticipated and unanticipated shifts of the
exchange rate on the macroeconomy. Anticipated shifts have limited effects, which minimize
the role of rational forecasts in guiding production plans in many developing countries. In
contrast, unanticipated deviation ofthe realized exchange rate from agents' forecasts induce
random fluctuations, with varying effects, which may be positive or negative, on output
growth and price inflation. Such fluctuations signal the importance of varying the exchange
rate in line with agents' forecasts, striking an appropriate balance between maintaining
sufficient flexibility to ensure competitiveness while maintaining agents' confidence to hold
domestic currency.
The remainder of the paper is organized as follows. Section II presents the theoretical model.
Section III outlines the empirical models. Section IV presents empirical results. The
summary and conclusion are presented in Section V.
II. THEORETICAL BACKGROUm
In the real world, stochastic uncertainty may arise on the demand or supply sides of the
economy. Economic agents are assumed to be rational. Accordingly, rational expectations of
demand and supply shifts enter the theoretical model. Economic fluctuations are then
determined by unexpected demand and supply shocks impinging on the economic system.
The paper introduces a macro-economic model that incorporates exchange rate fluctuations
of the domestic currency. Fluctuations are assumed to be realized around a steady-state trend
that is consistent with variation in macro-economic fundamentals over time. Uncertainty
enters the model in the form of disturbances to both aggregate demand and aggregate supply.
Within this framework, aggregate demand is affected by currency depreciation through
exports, imports, and the demand for domestic currency, and aggregate supply is affected
through the cost of imported intermediate goods. The model demonstrates theoretically that
anticipated currency depreciation decreases real output growth, via the effect on the supply
side. However, the relationship between unanticipated currency depreciation and aggregate
demand makes the final outcome inconclusive.
-6-
A. Aggregate Demand
The demand side of the economy is specified using standard IS-LM equations with a
modification for an open economy. The specifications below describe equilibrium conditions
in the Goods and Money markets. All coefficients are positive and throughout the paper,
lower case denotes the logarithm of the corresponding level variable. The subscript t denotes
the current value of the variable.
(I)
(2)
(3)
(4)
RE = S,P,
,
(5)
p'
,
(6)
im, = mo +~Y,
+m2log(RE,), ~,m2
>0
(7)
(8)
m, - p,
= -/t[r,
+ (E,P<+1 - p,)j + ¢Y, + 8 (E,S'+1 - s,), /t,¢,8 > 0 (9)
Equations (J) through (8) describe equilibrium conditions in the Goods market. In equation
(1), real consumption expenditure, c, varies positively with real disposable income, Yd. In
equation (2), disposable income is defined to be the net of real income, Y, minus taxes, t. In
equation (3), real taxes are specified as a linear function of real income. In equation (4), real
investment expenditure, i, varies negatively with the real interest rate, r. In equation (5), the
domestic price level is represented by P and the foreign price level in foreign currency is
represented by P* S denotes the spot price of domestic currency. It measures the number of
foreign currency units per units of domestic currency. RE is the price of domestically
produced goods and services relative to the prices of foreign produced goods and services,
i.e., the real exchange rate of the domestic currency. When RE increases, the domestic
currency appreciates in real terms. The value of RE measures the degree of competitiveness
offoreign produced goods and services relative to those produced domestically. In equation
6
For a similar definition, see Shone (1989).
-7(6), real exports are related to an autonomous element, Xo, which rises when the income level
abroad rises, and to relative prices. The inverse relationship between RE and x, in (6), refers
to the fact that when the domestic price is higher relative to foreign goods, exports will
decrease. In equation (7), real imports, im, are assumed to rise with the level of real income
and the real exchange rate of the domestic currency. Equation (8) describes the equilibrium
condition in the goods market. Real government spending, g, is assumed to be exogenous.
The total expenditure by domestic residents in real terms (y) is the sum of real consumption
expenditure (c), real investment (i), real government spending (g), and net exports (the real
value of exports, x, minus the real value of imports, im).
Substituting all equations into the equilibrium condition for the goods market results in the
expression for real income. It is a function of the exchange rate, the domestic price level, the
foreign price level, and the domestic interest rate. This expression is the IS equation which
describes the negative relationship between real income and the real interest rate.
In equation (9), equilibrium in the money market is obtained by equating the demand and
supply of real money balances. The real money supply is determined by nominal balances, m,
deflated by price,p. The demand for real money balances is positively related to real income
and inversely related to the nominal interest rate. The nominal interest rate is defined as the
sum of the real interest rate and inflation expectation at time t. EtSt"i is the expected future
value of the foreign currency at time t. It is assumed that citizens in each country must hold
domestic money for transactions purposes but they may speculate by holding foreign
money. 7 An unexpected temporary appreciation of the domestic currency in period t would
lead to speculation of depreciation in period t+ 1 to restore the steady-state normal trend of
the exchange rate, i.e., (Etst+l-sJ<O.' Consequently, agents decrease the speculative demand
for domestic currency, establishing a positive relationship between the demand for real
money balances and agents' expectation of the exchange rate relative to the current value of
the currency.
The LM equation is determined by the equilibrium condition in the money market. It
establishes a positive relationship between real income and the real interest rate. Solving for
the interest rate, Y, from the LM equation and substituting the result into the IS equation
results in the equation for aggregate demand.
7
For a similar discussion, see Buiter (1990).
Agents are inclined to dispose of domestic currency following unexpected appreciation.
Alternatively, speculative attacks may start if agents perceive the exchange rate to be
overvalued (e.g., in the event of a peg that cannot be sustained). Hence, the demand for
domestic currency decreases.
8
-8B. Aggregate Supply
On the supply side, output is produced using a production fuuction that combines labor,
capital, energy and imported intermediate goods. When the currency depreciates (or is
devalued), it is more expensive to buy intermediate goods from abroad. The price of energy
is paid in dollars in order to isolate this variable from fluctuations in the exchange rate.
To illustrate, the level of gross domestic output, Q, is produced using a production function
that combines imported intermediate goods, U, labor, L, and the capital stock, K. The
production function is Cobb-Douglas in U and L, assuming fixed capital stock 9 In addition,
the production function is dependent on the energy price, Z. Accordingly, the supply-side of
this economy can be summarized in equations (10) through (14) as follows:
(10)
1;
=
Q, - REp,
(11)
I: =u, -'7{w,- p, +z,-logo},
u,
I
=1, +-(log(l-o)-z,
o
1
1-0
'7=-->0
+log(RE,)}
(12)
(13)
(14)
Equation (10) specifies the level of gross domestic output produced, assuming
complementary relation between the labor input and imported intermediate goods. Equation
(II) defines domestic value added (output supplied) or the difference between gross domestic
output and the amount of real intermediate imports. lo
To derive the demand for inputs, the marginal product of Land U is calculated and the results
are equated with the real cost oflabor (the real wage) and the real price in domestic currency
of imported intermediate goods (the real exchange rate). Taking log transformation of the
first-order conditions and rearranging produces equations (12) and (13). The demand for
labor varies negatively with the real wage and positively with imported intermediate goods.
Similarly, the demand for imported intermediate goods increases with the labor input. The
Fixing the capital stock excludes the possibility that depreciation may increase labor
productivity by stimulating capital accumulation.
9
10 This definition follows Agenor (1991) where he introduces a model and assumes
intermediate goods are necessary for the production process and carmot be produced
domestically.
-9-
appreciation of currency decreases the real price of imported intermediate goods and, hence,
increases the demand for these goods. Furthermore, a rise in the energy price decreases the
demand for labor and imported intermediate goods.
Equation (14) hypothesizes a positive log-linear relationship between labor supply and
expected real wage. The supply oflabor increases with an increase in the nominal wage
relative to workers' expected price at time I-I.
The nominal wage solution is obtained by equating labor demand and labor supply.
Substituting the nominal wage into labor demand results in the solutions for employment and
imported intermediate goods. Substituting for I and u into the log transformation of equation
(10), results in an equation for gross domestic output supplied. Substituting the result into the
log transformation of equation (II) results in an equation for the aggregate supply of
domestic value added. For details of the model solution, see Kandil and Mirzaie (2003).
Aggregate supply has a direct positive relationship with output price surprises. Workers
decide on labor supply based on their expectation of the aggregate price level. An increase in
aggregate price relative to workers' expectations increases the demand for labor and, hence,
the nominal wage. A rise in expected real wage increases employment and, hence, the output
supplied. In addition, the aggregate supply moves positively with the foreign currency price
of domestic currency. Currency appreciation decreases the cost of imported goods and
increases the output supplied. Further, the output supplied varies negatively with changes in
the energy price.
C. Market Equilibrium
Internal balance requires that aggregate demand for domestic output be equal to aggregate
supply of domestic output at full employment. It is assumed that demand and supply shifts in
the model are constructed of two components: anticipated (steady-state) component and an
unanticipated (random) component. The combination of demand and supply channels
indicates that real output depends on unanticipated movements in the exchange rate, the
money supply, government spending, and the energy price. II In addition, supply-side
channels establish that output varies with anticipated changes in the exchange rate and the
energy price.
Given demand-side channels, aggregate demand increases with an unexpected increase in
government spending or the money supply, creating positive price surprises and, hence,
increasing output and price in the short run. Changes in the energy price, both anticipated
II With the exception of the energy price, shocks are assumed to fluctuate in response to
domestic economic conditions or in response to external vulnerability, e.g., capital mobility
or fluctuations in foreign reserves.
- 10 and unanticipated, increase the cost of the output produced, decreasing output and raising
prices. 12
The complexity of demand and supply channels may determine the results of exchange rate
fluctuations as follows:
1.
In the goods market, a positive shock to the exchange rate of the domestic currency
(an unexpected appreciation) will make exports more expensive and imports less expensive.
As a result, the competition from foreign markets will decrease the demand for domestic
products, decreasing domestic output and price.
2.
In the money market, a positive shock to the domestic currency (an unexpected
temporary appreciation) relative to anticipated value, prompts agents to hold less domestic
currency and decreases the interest rate. This channel moderates the contraction of aggregate
demand and, therefore, the reduction in output and price in the face of a positive exchange
rate shock.
3.
On the supply side, a positive shock to the exchange rate (an unanticipated
appreciation) decreases the cost of imported intermediate goods, increasing domestic output
and decreasing the cost of production and, hence, the aggregate price level.
III. EMPIRICAL MODELS
The empirical investigation analyzes annual time-series data of real output and price in 33
developing countries. The sample period for investigation is 1971-2000 (see Appendix B for
details). Over time, it is assumed that real output growth and price inflation fluctuate in
response to aggregate domestic demand shocks, energy price shocks and exchange rate
shocks. Shocks are randomly distributed over the time span under investigation.
Exchange rate shocks are assumed to be distributed around an anticipated stochastic steadystate trend. This trend varies with agents' ohservations of macroeconomic fundamentals that
are likely to determine the exchange rateD Positive shocks to the price of domestic currency
12 The price level may rise unexpectedly in response to energy price shocks, creating
incentives to increase the output produced. This channel moderates the reduction in output
and the rise in price in response to energy price shocks. For a detailed theoretical illustration,
see Kandil and Woods (1997). The moderating effect of the rise in price is further reinforced
in the theoretical model through the increase in the real exchange rate, reducing the real cost
of intermediate imported goods.
The theoretical model does not determine the exchange rate or other policy variables
endogenously. Instead, the model is solved for the reduced forms that determine the
responses to exogenous policy shocks. In theory, shocks approximate unanticipated
components of policy shifts based on rational expectations. For example, an overvalued
exchange rate represents an unanticipated currency appreciation around agents' expectation
of what the exchange rate should be.
13
- 11 in foreign currency represent unanticipated appreciation around this trend. Negative shocks
represent unanticipated currency depreciation. Over the time span under investigation, these
shocks are assumed to occur with equal probability around the stochastic moving trend.
Detailed econometric methodology is provided in Appendix A. Detailed description and
sources of all data are described in Appendix B.
The model specification is based on the results of the test for non-stationarity of real output 14
Dy, = 4, + A1EHDz, + A, (Dz, -E,_,Dz,)+ A3 E,_,Drn, + A,(Drn, - EHDrn,)
+A,EHDg, + A6 (Dg, - E,_,Dg,) + A, E,_, Drs, + A, (Drs, - EHDrs,)
+A,ECH +v;
(15)
The test results are consistent with non-stationary real output for all countries under
investigation. Given these results, the empirical model of real output is specified in first
difference form where DO is the first-difference operator15 Accordingly, all variables in the
model enter in first-difference form. We also test for the non-stationarity of the energy price,
the money supply, government spending and the exchange rate. Given evidence of non- '
stationarity, we test for co-integration between the non-stationary dependent variables and
non-stationary independent variables. Given evidence of co-integration, we introduce an
error correction term, ECI _I , into the empirical model. The error correction term is the lagged
value of the residual from regressing the non-stationary dependent variable on nonstationary, jointly co-integrated, right hand-side variables. The unexplained residual of the
model is denoted by vi .
Agents are expected to negotiate higher wages in anticipation of demand expansion. [n tum,
anticipated demand shifts are neutral. 16 Nonetheless, anticipated demand shifts may
14 For details, see Kwiatkowski and others (1992). Non-stationarity indicates that, real output
follows a random-walk process. Upon first-differencing, the resulting series is stationary,
which is the domain of demand and supply shifts, as specified in theory.
15 Given the non-stationarity of the estimated dependent variables (results are available upon
request), the empirical models are estimated in first-difference form. Hence, the anticipated
component measures anticipated change in the policy variable. Shocks approximate
unanticipated change (growth) in the policy variable.
16 In the real world, institutional rigidity may interfere with agents' ability to adjust fully to
anticipated demand shifts. In the labor market, contracts may be longer than one year,
preventing wages at time t from adjusting fully to anticipated demand shifts at time /-1.
Alternatively, institutional rigidity may be attributed to price rigidity in the product market.
For details, see Kandil ([996).
- 12-
detennine real output through their effects on anticipated real exchange rate. 17 Consequently.
anticipated demand shifts may increase real output.
Let z, be the log value of the energy price. Agents' expectation of a variable at time I based on
infonnation available at time I-I is denoted by E,_}. Based on theory's forecast. output growth
is expected to vary negatively with changes in the energy price, both anticipated and
unanticipated, at time I-I. Accordingly, A}, A, <0. 18 Two sources of domestic policies,
government spending and the money supply, approximate demand shifts, where g, and m,
denote the log values of government spending and the money supply. Unanticipated growth
in government spending and the money supply increase aggregate demand, creating positive
price surprises. Hence, A 4, A6>0. Anticipated growth in government spending and the money
supply may also increase real output growth. Accordingly, A3, As>O.
Finally, anticipated appreciation of the real exchange rate detennines the cost of the output
supplied. Let rs, be the log value of the real exchange rate. 19 Based on Data availability, the
exchange rate is measured by the real price of the domestic currency in U.S. Dollars.
Accordingly, a rise in the exchange rate indicates real appreciation of the domestic currency.
As producers anticipate a lower cost of imported intennediate goods, in the face of currency
appreciation, they increase the output supplied. Accordingly, A,>O.
Unanticipated chan~e
in the exchange rate is likely, however, to detennine both aggregate
demand and supply 0. Unanticipated currency appreciation, a positive shock to the exchange
rate, decreases the cost of buying intennediate goods, increasing the output supplied.
Concurrently, appreciation decreases net exports and the demand for domestic currency. The
final effect remains indetenninate on aggregate demand, output, and price.
17 Anticipated demand shifts increase price, increasing anticipated real exchange rate. This
channel moderates anticipated increase in the real cost of imported intennediate goods,
increasing the output supply.
The energy price is measured by the international energy price. For oil exporting countries,
changes in oil price are likely to contribute positively to output growth. The increased
capacity, following a rise in the energy price, is likely to moderate price inflation.
18
19 This measure captures shifts attributed to the nominal exchange rate, s, and the foreign
price ofimports,p*, in theory.
20 Unanticipated currency appreciation may be the result of unanticipated shock that moves
the exchange rate relative to its expected value. Alternatively, unanticipated appreciation
may be consistent with an overvalued currency compared to agents' expectations that have
adjusted downward in view of underlying macroeconomic fundamentals.
- 13 To establish robustness, the empirical model in (15) is reestimated, replacing specific
demand shifts (government spending and the money supply) with a broad measure of
aggregate demand (nominal GDP or GNP) as follows:'
Dy, =
Au + AIE<-]Dz, + A, (Dz, -
E'_I Dz,) + A3E'_IDn, + A4 (Dn, - E'_IDn,)
+A,E'_IDrs, + A6 (Drs, - EHDrs,) + A,EC'_I + v;'
(16)
Here, n, denotes the log of the nominal value of Gross National or Domestic Product. This
broad measure combines a variety of demand shifts stemming from the goods or money
markets. Accordingly, A3>0, and A4>0. Model estimation will then determine how important
exchange rate fluctuations are, given all other shocks impinging on the aggregate economy.
To demonstrate fluctuations in the output price, an empirical model is specified as follows:
Dp, = Bo +BIEI-\Dz, +B, (Dz, - E'_IDz,) + B3 E'_I Dm, + B4 (Dm, -EI-\Dm,)
+B,E'_IDg, + B6 (Dg, - E,_IDg,) + B,EI-IDrs, + B8 (Drs, - E'_IDrs,)
(17)
+b,EC<-] + v;
Based on test results, output price is evident to be non-stationary for the various countries
under investigation. Accordingly, the empirical model is specified in first -difference form.
Energy price shifts, both anticipated and unanticipated, increase the cost of the output
produced and, hence, prices. Accordingly, B}, B2>0. Both anticipated and unanticipated
demand shifts increase price inflation. Accordingly, B3 , B4, B5, B6>0.
Given the effect of anticipated currency appreciation in increasing the output supplied, price
inflation decreases and B7<022 An unanticipated appreciation of the domestic currency (a
positive shock to the exchange rate) increases the output supplied and may decrease (net
exports effect) or increase (money demand effect) aggregate demand. The former two
channels are deflationary while the latter increases price inflation.
To establish robustness, the empirical model of price inflation is modified, replacing specific
demand shifts with a broad measure of aggregate demand, nominal GNP/GDP shifts, as
follows:
21 This measure is likely to vary with a variety of shocks underlying aggregate demand: the
money supply, goverrunent spending, velocity, consumption, investment, and external shocks
attributed to fluctuations in the current and capital accounts.
Anticipated shifts in the real exchange rate are function oflagged values of variables that
enter the forecast equation, including its own lags. Hence, lagged values of domestic price
are captured in anticipated currency shifts.
22
- 14-
Dp, = Bo + B1EHDz, +B, (Dz, -EHDz,)+B]EHDn, +B4 (Dn, -E'_IDn,)
+B,E'_IDrs, + B6 (Drs, - E'_IDrs,) + B7 EC'_1 +v{'
(18)
Price inflation varies positively in the face of aggregate demand shifts, both anticipated and
unanticipated. Accordingly, B3>0 and B4>0. Note that aggregate demand shifts are allocated
between output growth in (16) and price inflation, in (18). Nonetheless, we estimate a
separate equation for price to test the effects of exchange rate fluctuations while controlling
for a broad measure of aggregate demand in the empirical model.
IV.
EMPIRICAL RESULTS
The results of estimating the empirical models of real output and price incorporating
government spending and the money supply are presented in Table 1 for the sample of
developing countries under investigation. These results indicate the effects of policy
variables, as approximated by the monetary, fiscal and exchange rate shifts on output growth
and price inflation. Table 2 contains the results of estimating the empirical models that
incorporate nominal GNP or GOP as a proxy for aggregate demand.
A. Fluctuations in the Face of Policy Shifts
Tables 1 and 2 summarize the parameter estimates for output and price in the empirical
models in (15) and (17) for the sample of33 developing countries under investigation.
Theory predicts that an increase in the energy price, both anticipated and unanticipated,
increases the cost of the output produced. Hence, the output supplied decreases and price
inflation increases. In oil-producing countries, however, an increase in the energy price is
likely to cause an expansion in the output supplied and a reduction in price inflation.
Anticipated changes in the energy price are generally insignificant on output and price in
various countries. Unanticipated change in the energy price is consistent with a significant
output contraction in one country and with a significant price inflation in three countries.
Theory predicts that agents adjust wages and prices in the face of anticipated monetary shifts,
neutralizing their effects on output. Consistent with theory's predictions, anticipated
monetary shifts are insignificant in determining real output growth. The inflationary effect of
anticipated monetary shifts is significant on price in four countries.
Unanticipated monetary shifts are distributed between real output growth and price inflation
with a coefficient that is dependent on the slope of the short-run supply curve. Output growth
does not vary significantly in the face of unanticipated monetary shifts in any country. There
is evidence, however, of an increase in price inflation in the face of unanticipated monetary
growth in five countries. Overall, the evidence indicates limited effects of monetary policy
on real output growth in developing countries.
.
Consistent with neutrality, anticipated government spending appears also insignificant on
output growth in developing countries. Except for one country, anticipated government
spending does not accelerate price inflation significantly. There is evidence, however, of a
- 15 significant reduction of price inflation in the face of anticipated government spending in one
country.23 Output growth increases significantly in the face of unanticipated government
spending in one country. The inflationary effect of unanticipated government spending is
evident and significant in six countries. There is evidence, however, of a significant reduction
in price inflation in the face of unanticipated government spending in one country. Overall,
the real effect of fiscal policy is not significant to stimulate growth in developing countries.
The exchange rate is measured by the real price of domestic currency in u.s. dollar.
Acordin~ly,
a rise in the exchange rate indicates real appreciation of the domestic
currency. 4 Theory predicts that anticipated appreciation in the value of the domestic
currency decreases the cost of imported goods and increases output growth. There is no
evidence of significant output growth or price deflation in any country. Hence, the supplyside channel is not significant to transmit the effects of anticipated exchange rate shifts.
Unanticipated fluctuations of the domestic currency affect the demand and supply sides of
the economy. A positive shock to the exchange rate (an unanticipated appreciation) increases
the output supplied and decreases money demand and net exports. The first two channels
cause output expansion, while the latter causes output contraction. In contrast, price inflation
is likely to decrease with the increase in the output supplied and the reduction in net exports.
Price inflation is likely to accelerate with the decrease in money demand. Output contraction
is evident and significant in two countries. Output expansion is evident and significant in
three countries. Hence, the evidence is not conclusive on the direction of the output response
to unanticipated currency appreciation. Price inflation increases significantly in the face of
unanticipated currency appreciation in four countries. Price inflation decreases significantly
in the face of unanticipated currency appreciation in two countries. Hence, the results are
mixed concerning the inflationary effect of unanticipated currency appreciation.
B. Fluctuations in the Face of Aggregate Demand Shifts
Tables 3 and 4 summarize the parameter estimates for output and price in the empirical
models in (16) and (18) for the sample of33 developing countries under investigation.
Output contraction is evident and significant in the face of anticipated energy price increase
in one country, where the inflationary effects are also significant. Output contraction is
evident and significant in the face of unanticipated energy price increase in two countries.
Price inflation is evident and significant in the face of unanticipated energy price increase in
four countries. Hence, the evidence remains robust concerning the limited effects of
fluctuations in the energy price on economic performance in the sample of developing
countries under investigation.
23
This evidence indicates significant crowding out effect of government spending.
24 Throughout the paper, appreciation will describe increase in the foreign price of domestic
currency attributed to either market forces or managed policy within a year. The estimation
technique accounts for the endogeneity of the exchange rate with respect to domestic
economic conditions. Exogenous shocks are attributed to domestic and/or external shocks.
- 16Anticipated aggregate demand shifts are generally significant to stimulate output growth in
one country. Nonetheless, output contraction is evident and significant despite anticipated
aggregate demand shifts in two countries. In the remaining countries, the insignificant effects
of anticipated demand shifts on real output growth support neutrality. Consistently,
anticipated aggregate demand shifts increase price inflation significantly in 21 countries.
Evidence of significant price inflation appears also pervasive in the face of unanticipated
aggregate demand shifts, as evident by the positive and significant response in 26 countries.
Evidence of significant output expansion in the face of unanticipated aggregate demand shifts
is evident in 11 countries.
Overall, the significant effects of aggregate demand shifts appear more pervasive compared
to specific policy shifts. Hence, constraints on the demand side of the economy limit the
transmission mechanism of specific policy shifts, namely fiscal and monetary, to the product
market of many developing countries. Further, sources of spending do not appear to be
closely tied to monetary or fiscal policies in many developing countries.
Anticipated appreciation of the exchange rate is consistent with a significant output
expansion in one country, without any significant evidence of price deflation. Hence, the
evidence remains robust concerning the limited effect of the supply-side channel in
transmitting anticipated exchange rate shifts to the product market of the developing
countries under investigation.
Unanticipated exchange rate appreciation induces significant output expansion in six
countries. This evidence is consistent with the effect of currency appreciation in expanding
the output supplied and decreasing money demand. Consistent with the effect of currency
appreciation in decreasing net exports, output contraction is significant in nine countries.
Consistent with theory's predictions, the effects of unanticipated exchange rate fluctuations
may be positive or negative on price inflation. Consistent with the reduction in money
demand, price inflation increases significantly in the face of unanticipated currency
appreciation in five countries. Consistent with the increase in output supply and the reduction
in net exports, price inflation decreases significantly in the face of unanticipated currency
appreciation in five countries. The mixed significant evidence provides further support for
the complexity of demand and supply channels in determining the effects of exchange rate
fluctuations on price inflation in many developing countries.
V.
SUMMARY AND CONCLUSION
The analysis has focused on the effects of exchange rate fluctuations on a sample of 33
developing countries. To that end, the paper presents a theoretical rational expectation model
that decomposes movements in the exchange rate into anticipated and unanticipated
components. Anticipated changes in the exchange rate enter the production function through
the cost of imported goods. Unanticipated currency fluctuations determine aggregate demand
through exports, imports, and the demand for domestic currency, and determine aggregate
supply through the cost of imported intermediate goods.
- 17 Let the exchange rate be the real price of the domestic currency in terms of a major
international currency. Anticipated movements in the exchange rate are assumed to vary with
agents' observations of macroeconomic fundamentals determining changes in the exchange
rate over time. A positive shock to the exchange rate, an unanticipated appreciation of the
domestic currency, decreases net exports and money demand and increases the output
supplied. Based on the strength of each channel, the combined effects of demand and supply
channels may determine the direction of output and price adjustments in the face of currency
fluctuations.
In general, developing countries are characterized by a high degree of price flexibility in the
face of aggregate demand shifts, both anticipated and unanticipated. Nonetheless, the real
and inflationary effects of specific policy shocks, fiscal and monetary, appear limited on
output and price. Hence, demand-side constraints block the transmission mechanism of
domestic policies to the product market in many of the developing countries under
investigation. Further, aggregate spending does not appear to be closely tied to monetary and
fiscal policies in many developing countries.
Anticipated exchange rate appreciation varies with agents' rational forecasts. The evidence
indicates limited effects of anticipated exchange rate appreciation on output growth and
inflation. Hence, rational forecast of the exchange rate has rather limited usefulness for
gauging the strategy of agents in developing countries. Producers do not adjust the output
supply in anticipation of a lower (higher) cost of imported goods in response to anticipated
exchange rate appreciation (depreciation). In contrast, unanticipated movement in the
exchange rate, beyond agents' forecasts, have significant effects on output and prices in
many developing countries. Unanticipated exchange rate may be the result of a change in
agents' rational forecast, under a fixed exchange rate regime, or the result of an unexpected
movement in the exchange rate, under a flexible exchange rate regime. In line with theory's
prediction, the effects of unanticipated exchange rate fluctuations on output and prices may
be positive or negative across countries, according to the relative effects of currency
fluctuations on the supply and demand of the respective economies.
Consistent with the effects of unanticipated exchange rate appreciation (depreciation) in
decreasing (increasing) net exports, output contraction (expansion) is evident and significant
in nine countries. Consistent with the effects of unanticipated exchange rate appreciation
(depreciation) in increasing (decreasing) output supply and decreasing (increasing) money
demand, output expansion (contraction) is evident and significant in seven countries. The
reduction in net exports and the increase in output supply decrease price inflation. In contrast,
the reduction in money demand is inflationary. In accordance with the first two channels,
unanticipated currency appreciation (depreciation) increases (decreases) price inflation
significantly in six countries. In line with the money demand channel, however,
unanticipated currency appreciation (depreciation) increases (decreases) price inflation
significantly in seven countries.
The results clearly illustrate the importance of designing exchange rate policy that is
consistent with agents' forecasts, given underlying macroeconomic fundamentals.
Movements in the exchange rate that are consistent with agents' expectations have limited
- 18 effects on the macroeconomy. Tn contrast, in many developing countries high variability of
exchange rate fluctuations around its anticipated value may generate adverse effects in the
form of higher price inflation and larger output contraction. Althougb stimulating net exports
througb currency depreciation is desirable, it is crucial to ensure a concurrent increase in
productive capacity to cope with the increased demand without accelerating price inflation.
Equally important is to increase production capacity in import-substituting industries to
reduce the adverse effects of currency fluctuations on price inflation and the output supply.
Finally, monetary policy should aim at minimizing extensive fluctuations in the exchange
rate that may induce speculative attacks and undermine the stability of the money demand
function. Toward this objective, exchange rate policy should aim at striking the right balance
between necessary flexibility to ensure competitiveness and desirable stability to increase
confidence in the domestic currency and the underlying fundamentals that provide support to
the currency's value over time.
- 19 Table I. Summary of Parameter Estimates for the Output Equation in 33 Developing
Countries: Results of the Model Using Government Spending and the Money Supply
Anticipated
Anticipated
Government
Unanticipated
Spending
Spending
Anticipated R.
Exchange Rate
-0.25
Unanticipated R.
E1I.change Rate
Money
Unanticipated
(-0.82)
Supply
0.24
(044)
Money Supply
0,003
(002)
-0.08
(.1.35)
0.26
0.12
(0.89)
(102)
-0.02**
(·2.00)
0.04
0.06
(0.39)
(108)
-0,005
(.020)
-0.004
(.0.09)
-0.02
-0,01
om
-0.56
-0.17
(0.0 [)
(·105)
(·0.43)
(0.49)
(.0.66)
(·1.25)
0.38
(0.67)
0,03
(0.67)
0.06
0.01
-0,06
_0.03
(1.40)
(0.33)
(·1.29)
(.0.79)
0.08
(0.42)
(0.22)
0,07
-0.01
(.005)
-0.12
0.20
-0.09
0.04
0,3&
0.25
(·0.19)
(0.55)
(·012)
(0.06)
(0.55)
(0.47)
1.14
(0.56)
0.05
0,06
(0.62)
0.07
(1.16)
0.23
(0.56)
(0.70)
0.06
(0.63)
-0.39
(·099)
(1.03)
0,65
(0.39)
0.01
(0.06)
0.25
(0.90)
(2.54)
·0,45
(.1.74)
(·0.93)
(2.03)
Anticipated
Energy Price
-0,08
(.0.50)
0.14
(0.19)
0.54
(0.18)
13.76
(0.10)
Unanticipated
Energy Price
-0.03
-1.05
Government
-0.002
0.18
(1.71)
(·0'")
(.0.02)
-0.26
(-108)
_0.18
0.82
0.16
(.1.18)
(0.37)
(1.74)
0,002
(005)
-0.03
0.14
(.0.60)
(107)
0.06
(0.36)
(-0.54)
0.02
0.02
-0.04
(0.29)
(·132)
-0.13
(.028)
0.02
-0.27
0.06
(0.25)
(.0.91)
(0.84)
·0,27
(·1.24)
-0.05
(.1.08)
(0.98)
(2.07)
-0.004
(-0.07)
0.04
-0.80
(106)
(.0.60)
.0.89
(.0.90)
-0.42
(-0.59)
0.09
(0.73)
-0.12
(.023)
0.09
(0.64)
(0.04)
0.18
(1.60)
(1.28)
0.46
(1.18)
-0.23
(·0.48)
-0.42**
(·2.53)
-0.10
-0.003
(·0.62)
(·0.06)
0.45
0.33**
0.2L
0.36*
om
-0.11
0.25
0.24
-0.02
-0,04
(0.53)
(·0.73)
(-0.12)
1.86
(0.21)
-0.04
-OM
0.002
0,04
(·0.82)
(.0.48)
(0.18)
(0.42)
1.90
(0.11)
0.05
0,11
(024)
-0.02
0.02
(0.57)
(.007)
(009)
-0.07
(.0.41)
0.17
(U4)
-0.03
(-0.14)
-0.11
0,06
(0.55)
0.21
-0.42
0.10
(-0.96)
(1.77)
(·1.55)
(0.17)
-0.09
(-1.54)
-0.16
(·0.68)
0,02
(0.33)
2A5
0.10
(0.30)
(0.21)
(1.34)
-0.07
(·0.90)
0.07
(1.20)
0.25
(0.31)
-0,03
(·0.88)
-0.14
0.02
-0.22
(0.08)
0.28
(0.34)
-0.02
(-0.57)
(_0.05)
(-0.55)
0.05
(0.18)
-0.04
0.05
(0.94)
-0.05
(.0.16)
0.001
(0.01)
0.16
(1.44)
0.03
(0.59)
-0.19
(.0.93)
(3.58)
-0.05
(.0.08)
-0.06
(-0.37)
0.18
(0.62)
(·124)
-0.41 *
(·432)
-0.11
(-0.08)
0.18
(.051)
0.64
-0.89
-0.02
-1.59
(.0.33)
(·0.17)
(-0.95)
-0.56
(.1.34)
-0,55
-0,05
(-1.30)
0.35
(0.75)
-0.01
0.06
0.14
(-0.04)
(0.36)
(1.23)
0.15
(0.35)
(·0.78)
-0.06
(.1.12)
0.27*
-0.15
0,11
-122
(0.01)
(·0.00)
(0.01)
(0.47)
(.0.20)
0,12
(0.85)
(-0.81)
(.(l.02)
0.20
(065)
0.04
(0.76)
-0.23
(·0.42)
0.43*
(2.37)
0.05
(0.18)
_0, It
(.1.58)
0,41
(0.83)
(·0.31)
0.03
72.43
-0.0001
45.04
-0.27
-0.002
-0.11
0.21 **
-0.34
0.05
(·0.75)
(1.03)
0.001
(000)
(0.37)
-0.06
(-0.27)
-0.06
(.0.44)
0.23
(1.49)
(2.48)
-0.27
(.0.66)
0.34
(1.54)
-0.08
(.0.09)
0.07
(0.15)
-0.72
(0.74)
0.24
(068)
1.89
(0.55)
(·182)
-0.99
- 20Anticipated
Anticipated
Energy Price
0.06
(0.28)
Unanticipated
Energy Price
Money
Supplv
Unanticipated
Monev Supply
-0.01
(-0.07)
Anticipated
Government
Spending
-0.17
(079)
Unanticipated
Government
Spending
0,10
(1.30)
Anticipated R.
Exchange Rate
0.60
(043)
Unanticipated R
Exchange Rate
-0,07
(-0.60)
-0.01
(-0.61)
-0.06
(-0.26)
0.35
(0.50)
-0.20
(-041)
0.10
(0.23)
-0.04
(-0.33)
-0.02
(-017)
-D.OI
0.G3
(-016)
(0.07)
0.44
(0.41)
-0.10
(-1.26)
-0,02
(0.50)
-0.02
(-0.85)
-0.28
(017)
-0.01
(-146)
(042)
0.04
(0.23)
0.40
(0.45)
0.001
(0.01)
0,08
(0.24)
0.05
(0.31 )
-0.32
(-0.51)
-0.29
(-0.91)
-3.21
(-0.33)
0,05
(0.22)
0.05
(0.08)
0.20
(0.97)
-2.36
(-0.48)
-0.07
(-0.34)
0.17
(0.32)
-0.31
(-0.67)
-0.11
(-011)
-0.59
(-146)
-0.10
(-0.15)
0.01
(0.48)
0.15
(1.74)
0.11
(1.23)
-0.05
(-0.10)
0.08
(0.64)
-0.07
(-0.59)
-0.02
(-0.38)
0.13
0.01
(0.33)
-0.03
(-0.14)
-0.12
(-0.50)
0.004
(014)
0.001
(0.02)
0,02
(0.45)
(015)
-0.02
(-0.17)
-0,09
(-015)
0.001
(0.01)
·0.46
(-144)
0.27
(047)
1.43
a.07
(1.03)
(0.31)
0.02
(0.24)
-0,08
(-0.61)
-0.03
(-0.35)
0.01
(031)
0.72
(134)
-0.24
(-1.16)
-0.03
(-0.12)
-0.05
(-0.48)
1.85
(0.64)
0.04
(0.27)
0.14
(0.34)
-0.05
(-1.05)
-0.02
(-0.08)
0.06
(0.41)
-0.02
(-0.13)
·0.11
(-1.18)
0.01
(002)
0.24**
(2.02)
Sources: Parameters are from the estimation of the empirical model in (15).
Notes:
* Significant at 5%.
•• Significant at 10%.
t-ratios are in parentheses_
2.27
-0.01
(-1.89)
- 21 Table 2. Summary of Parameter Estimates for the Price Equation in 33 Developing
Countries: Results of the Model Using Government Spending and the Money Supply
Anticipated
Eners:~
Price
0.28
(0.89)
Unanticipated
Energr Price
0.24*
(3.11)
Anticipated
Money
·1.90
(-1.06)
Unanticipated
Mone~'
SUEEh·0.06
(-017)
SUEElv
Anticipated
Government
Unanticipated
Government
SEending
Anticipated
R. Exchange
3.55
(1.02)
0.83*
(2.61)
2.09
(0.90)
-0.38
(-1.64)
(-0.27)
SEendi~
1<>10
Unanticipated
R. Exchange
1<>te
·0.35
(-0.21)
-0.02
(-0.09)
0.40
(049)
0.33
(0.97)
0.63
(0.87)
0.44
(1.02)
0.45
(019)
0.21
0.02
(0.97)
-0.15
(-0.82)
-0.04
(-0.38)
-0.14**
(041)
(-2.()7)
0.003
(0.06)
(O.S3)
0.47**
(2.04)
17.15
(0.24)
(1.99)
2.05*
(3.96)
(4.51)
-0.51
(-0.63)
0.19
(U5)
-31.2
(-0.37)
3.62*
(286)
3.90
(049)
-0.37
(-1.62)
0.49**
(215)
0.80*
(7.67)
0.56
(1.96)
0,28*
(2.67)
0.04
(0.05)
-0.12
(-048)
0.32
(0.39)
0.08
(0.61)
0.35
(0.47)
0.37
(1.02)
0.58
(0.64)
-0.35
(-0.54)
-0.51
(-0.71)
·0,32
(-062)
0.15
(1.06)
0.13
(l.76)
6.65
(0.66)
-0,03
0,03
(O.Il)
-0.13
(-0.98)
-0,94
(-0.16)
(-0.70)
0.31
(I.50)
-4.54
(-0.19)
0.23
(U8)
0.13
(0.24)
(1.06)
1.38
(1.40)
(0.69)
-\.03
(-0.42)
0.15
(0.54)
0.19
(088)
-0,004
(-014)
0,10
(lUI)
(0.91)
0.08
(0.38)
0.06
(0.48)
0.25
(102)
0.02
(0.26)
0.76
(092)
0.07
(0.52)
-0.14
(-0.60)
0.06
(037)
-1.45
(-059)
-0.34
(-100)
-3.25
(-094)
0.15
(0.33)
-0.84
(-0.62)
0.16
(Ul)
-0.08
(-0.10)
0.68**
(195)
1.03
(058)
0.18
(0.48)
-1.90
(-052)
-0.06
(-0.38)
-0.21
(-022)
-0.03
(-044)
0.01
(0.10)
-0.004
(-0.25)
-0.17
(-0.97)
·0.01
(-0 12)
-0.63
(-043)
0.27
(0.51)
1.52
(0.21)
-0.14
(-1.24)
·1.02
(-1.26)
0.40
(0.85)
-0.05
(-0.16)
0.42
(U8)
-0.08
(-0.12)
0.34
(168)
0.93
(0.70)
0.03
(0.31)
0.14
(0.36)
0.03
(0.18)
0.17
(0.71)
-0.08
(-0.57)
0.26
(0.21)
0.27
(0.52)
0.74
(044)
-0.04
(-0.16)
-0.62
(-0.56)
-0.17
(-0.32)
1.65
(056)
0.64**
(2.03)
0.11
(038)
-0.13
(-0.75)
-0.43
(-052)
-0.01
(-0.27)
0.31
(124)
-0.02
(-0.09)
-0.48
(-0.65)
0.21
(0.62)
0.49
(109)
-0.20
(-0.89)
-0.04
(-0.23)
0.18
(l.70)
-0.04
(-0.07)
0.05
(0.19)
-0.28
(-1.28)
0.05
(0.58)
0.60
(121)
-0.76*
(-5.63)
0.94
(030)
-0.14
(-U8)
-0.03
(-0.02)
0.26
(055)
-0.25
(-0.28)
-0.41**
(-2.21)
0.43
(l.l7)
-0.15
(-0.99)
-0.35
(-0.71)
0.02
(0.65)
O.3l"'*
(2. IS)
0.14
(145)
-0.18
(-109)
0.06
(102)
-0.10
(-121)
0.14
(065)
129.41
(0.01)
0.12
(160)
87.67
(0.01)
0.09
(037)
-41.36
(-0.03)
0.01
(0.06)
0.05
(0.09)
0.48*
(3.36)
0.07
(044)
0.14*
(324)
-0.89
(-Ul)
0.11
(0.77)
0.17
(0.66)
-0.05
(-0.89)
0.45
(107)
-0.35
(-146)
1.22
(0.40)
0.04
(0.25)
2.78
(080)
-0.20
(-0.63)
-0.78
(-029)
-0.85
(-159)
-0.28
(-102)
-0.08
(-030)
-0.05
(-0.23)
0.41
(0.62)
-0.20
(-024)
0.02
(002)
0.72
(036)
1.08
(162)
0.37**
0,72
0.23
UJO
0.47
U8"''''
(2.44)
0.44
(155)
0.14
-0.05
- 22-
Anticipated
EnerlQ: Price
Unanticipated
Ener~y
Price
Anticipated
Money
Unanticipated
Anticipated
Government
Cnanticipated
Government
Spendinl;!;
Anticipated
R. Exchange
Unanticipated
R. Exchange
Rat,
0.29
(1.49)
SUI2Qiv
Monel: SUI2Elv
SEending
-0.06
(-0.19)
0,01
(0.26)
0.39
(138)
0.55*
(2.94)
0.29
(1.06)
-0.01
1.33
(-0.13)
(058)
-0.73
(-0.57)
-0,04
(-0.40)
-0.28
(-0.33)
0.35
(136)
0.45
(171)
0.25*
(2.49)
(0.71)
0.23
(1.87)
-2.22
(-0.48)
0.12
(0.45)
1.22*
(582)
0.91 ..
(9.71)
-0.28
(-0.17)
0.01
(0.28)
-7.78
(-044)
0.12
(0.22)
0.40
(0.77)
0.03
(027)
-0.53
(-0.60)
0.16
(0.50)
0.35
(0.22)
-0.12
(-0.17)
12.18
(0.39)
-0.88**
(-2.07)
0.01
(0.20)
-0.01
(-064)
-0.33
(-0.52)
-0.003
(-020)
0.01
(0.37)
LIl*
l.06*
(0.91)
(14.06)
(38.12)
0.42
(0.43)
(-0.17)
-0.14
(-0.95)
-D. II
(-0.71)
1.26
(1.49)
0.11
(048)
-0.07
(-0.19)
0.08
(0.71)
-0.31
(-0.45)
-0.06
(-059)
·0,03
(-0.14)
-0.12
(-0.50)
0.004
(0.14)
0.001
0.02
(002)
(015)
-0.02
(-0 17)
-0.06
(-009)
-0.02
-0.50
(-0.68)
-0,60
0.14
(0.20)
-0.05
(-0.64)
2.32
(0.58)
-0.15
(-0.15)
(-0.79)
(-0.19)
0.12
(0.94)
·0.02
(-0.45)
-0.74
(-0.81)
0.09
(0.75)
0.15
(170)
-l.86
(-0.32)
(-.60)
-0.17
(-1.35)
3.87
(0.26)
0.01
(0.19)
0.66
(1.07)
-0.001
(-0.00)
l.23*
(291)
0.70*
(4.60)
1.90
(0.79)
-0.35
(-189)
-om
-0.06
0.03
Rate
0.66
Sources: Parameters are from the estimation of the empirical model in (17).
Notes:
* Significant at 5%.
** Significant at 10%.
t-ratios are in parentheses.
- 23 Table 3. Summary of Parameter Estimates for the Output Equation in 33 Developing
Countries: Results of the Model Using Nominal GDP
Anticipated
Eneq~,r
Price
Unanticipated
Ener~v
Price
Anticipated
Unanticipated
Nominal GOP
Anticipated R.
Exchansc Rate
0.06
0.21
(-2.08)
(1.68)
(1.05)
-0.37*
(-3.20)
·0.40
(-1.02)
Unanticipated R.
Exchanse Rate
-0.04
(-0.43)
0.08
(0.15)
-0.06
(-1.14)
-0.02**
(-1.93)
·0,0)
(-064)
0.01
(0.02)
0.16*
(2.25)
0.45
(0.20)
-0.003
(-0.40)
0.07
(0.82)
-0.23
(-139)
0.05
(0.49)
0.34**
(209)
2.32
(0.14)
0.01
(0.39)
0.01
(0.28)
-O.Q1
(-0.80)
-8.11
(-0.18)
0.56
(0.36)
0.01
(0.29)
-0,02
(-0.90)
-0,04
-0.23
(-[70)
(-0.63)
-0.22
(-1.03)
0,07
-0.05
(-1.08)
-0,01
(0.19)
(-054)
0.40
(0.")
-0.19
(-0.96)
-0.07
(-1.02)
(-0.19)
-0.05
(-0.15)
0.41 *
(325)
0.44
(1.22)
-0.11
(-1.33)
-0.52
(-0.37)
0.01
(0.30)
-0.04
(-0.22)
0.Q2
(0.42)
0.16
(0.27)
-0.02
(-0.45)
-0.13
(- I 15)
-0.004
(-0.26)
0.35
(1.17)
0.50*
(3.86)
-0.32
(-1.44)
-0.04
(-0.73)
-0.15
(-1.14)
0,08
-0.86
(058)
(-0.95)
0.18*
(2.66)
-0.11 **
-0.004
Nominal GDP
-0.15
(-0.69)
0.15**
(1.99)
om
-0,01
(0.07)
(-0.31)
8,83
(004)
(-1.77)
0.50
(0.46)
-0.18
(-1.64)
-0.28
(-0.50)
-0.07
(-1.43)
0,05
(0.49)
-0,01
(-0.32)
0,34
0.14
(1.05)
-0.36
(Ll I)
(-0.68)
-0.15
(-0.51)
0.72
(0.31)
0.04
(1.02)
-0.16
(-0.47)
0.03
(0.12)
·0.19
(-0.61)
-0.39'"
(-4.03)
·0.07
(-1.02)
-0.004
(-0.19)
-0.05
(-0.15)
0.41 *
(3.25)
0.44
(1.22)
-0.11
(-1.33)
-0.65
(-0.20)
·0.02
(-0.54)
0.53
(0.33)
0.12*
(2.29)
-0.01
(-0.15)
0.01
(0.31)
0.26
(0.34)
-0.01
(-0.51)
-0.01
(-0.03)
0.84
(1.44)
-0.20
(-0.84)
0.35
(1.45)
-0.08
(-0.94)
0.04
(0.70)
1.09
(0.81)
-019
(-0.96)
-0.39
(-0.90)
0.17**
(1.92)
-0.68
(-069)
0.04
(0.83)
0.99*
(2.56)
0.30'"
(223)
-0.17
(-0.79)
-0,13*
(-2.31)
-0.18
(-0.43)
-0.02
(-0.96)
0.35*
(2.21)
0.78*
(381)
-0.14
(-0.99)
-0.34*
(-6.21)
0.13
(-1.81)
(-061)
-0.68
(-0.63)
0.37**
(2.04)
-0.38
(-1.36)
(-241)
0.13
(0.34)
-0.02
(-0.70)
0.52
(1.54)
0.22
(1.42)
-0.06
(-013)
0.20
(1.47)
-0.74
(-044)
0.06
(178)
-0.04
(-097)
(-0.85)
-0.09
(-069)
0.14
(1.56)
0.35
(0.68)
-0.05**
-0.03
-0,06
0.47**
(1.90)
0.19**
(2.18)
-0.48
(-0.60)
-0.28*
0.19*
(3.20)
-0.83*
(-4.44)
- 24Anticipated
Unanticipated
Ener,sv Price
Ener~y
O.OS
(0.43)
(-0.56)
(074)
Cnanticipatcd
Nominal GDP
0.16
(094)
Anticipated
Nominal GDP
0.24
(0.56)
-0.02
(-0.87)
0.07
(0.41)
0.34
(0.34)
-0,01
(-0.17)
1.22
(0.39)
0.43
(0.32)
Unanticipated R
Exchange Rate
-0.03
(-0.28)
-0.04
(-0.21)
0.09
(0.48)
-0.09*
(-2.45)
-0.05*
(-3.37)
-0.02
(-056)
1.73
(0.54)
0.15
0.20)
0.02
(0.63)
-4.31
(-0.48)
0.20
(0.91)
-1.34
(-0.56)
0.22
(1.63)
0.95*
(13.14)
-0.84
(-1.56)
-1.03*
(-16.60)
Price
-0,01
OA8
Anticipated R.
Exchans:e Rate
DAD
-0.01
(0.98)
(-0.39)
0.90
(1.48)
-0.05
(-0.20)
0.04*
(1.86)
0.28
(0.92)
0.22**
(1.92)
-0.19
(-1.33)
19.08
(000)
0,02
(090)
·0.18
(-0.46)
0.14**
(1.93)
0.01
(0.01)
-0.07
(-1.47)
0.56
(0.35)
-0.14
(-0\6)
0.20
(\21)
-0,01
(0.04)
(-0.06)
-0.13**
(-2.16)
0.01
(0.36)
0.07
(0.18)
0.46
(1.66)
0.80
(0.22)
0.05
(0.46)
-0.09*
(-2.\6)
-0.14
(-1.07)
0.16
(1.22)
-0.46
(-0.41)
(2.41)
-0,04
(-0.64)
0.50
(0.32)
0,001
Sources: Parameters are from the estimation of the empirical model in (16).
Notes:
* Significant at 5%.
** Significant at 10%.
t-ratios are in parentheses_
-0.09**
(-1.99)
0.28*
- 25 Table 4. Summary of Parameter Estimates for tbe Price Equation in 33 Developing
Countries: Results oftbe Model Using Nominal GDP
Anticipated
Energy Price
Unanticipated
Energy Price
Anticipated
Nominal GOP
0.50**
(225)
Unanlicipated
Nominal GDP
1.15*
(10.99)
Anticipated R.
Exchange Rate
0.36
(0.82)
Unanticipated R.
Exchange Rate
-0.06
(-0.84)
0.13*
(2.73)
-0.04
(-1.25)
-12.86
(-0.15)
0.04
(0.71)
1.02*
(59.40)
1.02*
(2U4)
-0.34
(-0.26)
-0.003
(-0.33)
0.92*
(9.52)
(8.84)
(0.24)
-0.46**
(-2.82)
-6.70
(-0.17)
-0.002
(-0.08)
(26.31)
1.03*
(100.39)
9.60
(0.34)
-0.09
(101)
·0.87
(-0.25)
-0,02
(-0.53)
l.01*
(54.42)
1.04*
(5446)
0.07
(0.25)
0.97*
1.37*
2.25
(0.16)
0.02
-0.10
(-1.39)
-0.14**(-1.96)
0.34
-0,01
(0.93)
(-0.23)
1.08*
(16.92)
1.03*
(66.56)
-0.32
(-0.33)
(0.25)
0.06
(0.98)
0.01
(0.55)
1.13*
(2.50)
0,64*
(4.20)
-0.51
(-1.12)
0.10
(1.14)
1.28
(0.30)
0.01
(0.24)
0.74*
(1.89)
0.89*
(5.20)
2.93
(0.38)
0.06
(0.62)
0.05
(0.69)
0,004
(0.30)
0.96*
(2.94)
0.20
(U8)
0.15
(0.95)
-0,03
(-0.47)
0.13
(0.85)
0.01
(0.28)
1.04*
(4.62)
0.B7*
(5.94)
0.22
(0.27)
-0.15
(-1.64)
-2.34
(-0.23)
0.06*
(2.23)
(011)
l.lO*
(9.92)
0.57
(046)
0.06
(0.97)
·0.28
(-1.06)
-0,03
(-068)
0.79*
(3.48)
0.82*
(4.52)
0.19
(0.37)
0.14
(0.50)
-0.86
(-0.28)
-0.03
(-0.77)
1,23*
(2.92)
1.20*
(3.37)
-0.07
(-018)
0.40*
(2.53)
0.06
(0.98)
(0.55)
1,13*
(2.50)
0.64*
(4.20)
-0.51
(-Ll2)
0.10
(Ll4)
0.59
(0.28)
-0.004
(-0.09)
lAO*
(3.92)
0.92*
(1189)
0.04
(0.54)
0.02
(0.43)
-0.32
(-0.35)
0.01
(059)
1.01
(1.96)
0.59
(1.49)
0.35
(139)
(-0.98)
0.08
(0.93)
-0.04
(-0.89)
-0.13
(-0.10)
1.18*
(5.99)
0.40
(0.90)
-0.19**
(-2.09)
0.68
(0.61)
-0.06
(-083)
-0.16
(-0.24)
0.96*
(5.07)
0.42
(1.22)
0.04
(0.51)
0.29
(0.56)
-0.005
(-0.24)
0.60*
(284)
0.30
(1.29)
0.20
(1.43)
0.43*
(5.82)
-0.80
(-0.85)
O.tIl
(0.17)
1.46*
(2.31 )
0.78*
(6.52)
0.35
(1.62)
0.24
(0.44)
-0.21
(-1.27)
1.07*
(1150)
-0.17
(-1.81)
-0.18*
(-2.89)
0.22
(0.39)
0.66*
(396)
om
0.15
-0.02
(-0.31)
0.08**
(1.77)
-0.22
(-0.64)
0.08*
(2.56)
0.72
(0.40)
-0.05
(-1.34)
1.03*
(21.92)
0.06
(0.69)
-0.03
(-0.38)
0.53
(145)
0.58**
(203)
0.40**
(1.98)
0.07
-0.16
- 26 Anticipated
Energy Price
-0.10
(-0.50)
Unanticipated
Anticipated
Energy Price
·0.002
(-0.13)
Nominal GDP
Unanticipated
NominalGDP
0.05
(0.06)
0.51**
(1.79)
L05*
Anticipated R.
Exchange Rate
1.17
(0.48)
Unanticipated R.
Exchange Rate
·0.25
0.20
(1.41)
-5.89
(-0.08)
0.06
(1.18)
0.79*
(2.91)
(444)
(-0.72)
0.09
(1.21)
0.27
(0.26)
-0.03
(-0.46)
1.03*
(54.33)
1.05*
(33.69)
-1.44
(-0.49)
-0.12
(-1.01)
-1.36
(-0.47)
-0,05
(-1l7)
5.99
(0.84)
(1.97)
0.97
(0.58)
-0.04
(-0.20)
0.02
(0.48)
0.004
(037)
0.37
(0.65)
0.02
(1.16)
1.15*
(3.36)
1.03*
(50.29)
0.14
(0.44)
0,06
(0.24)
0.15
(0.33)
0,49*
(258)
-0.40
(-1.71)
(1.42)
0.23
(0.20)
·0,01
(-0.85)
1.09*
(3.52)
0.93*
(10.88)
0.01
(0.24)
0.05
(083)
0.66
(061)
-0,05
(-1.23)
1.48
(1.28)
0.78*
(5.63)
-0.08
(-0.57)
-0.004
(-0.05)
0.28
(1.30)
-0.02
(-0.63)
0.47
(085)
0.67
(1.78)
-2.23
(-0.66)
-0.12
(-0.87)
-0.13
(-0.50)
0.10*
(2.44)
0.96*
(5.42)
1.04*
(7.35)
0.24
(032)
(-3.22)
O.64*'"
Sources: Parameters are from the estimation ofthe empirical model in (18).
Notes:
* Significant at 5%.
** Significant at 10%.
t-ratios are in parentheses.
D,UK
-0.34*
- 27 -
APPENDIX I
ApPENDIXES
I.
ECONOMETRIC METHODOLOGY
The surprise terms that enter models (15) through (18) are unobservable, necessitating the
construction of empirical proxies betore estimation takes place. Thus, the empirical models
include equations describing agents' forecast of aggregate or specific demand growth, the
change in energy price, and the change in the real price of domestic currency in US dollar
(the real exchange rate). All variables are first-differenced to render the series stationary.
To decide on variables in the forecast equations, a formal causality test is followed. Each
variable is regressed on two of its lags as well as two lags of all variables that enter the
model: the change in the log value of the energy price, nominal GNP or GDP, the real
exchange rate, government spending, and the money supply. The joint significance of the
lags is tested for each variable. Accordingly, the forecast equations account for the lags of
variables proven to be statistically significant.
Subtracting the above forecasts from the actual change in the variable results in surprises that
enter the empirical model. In order to obtain efficient estimates and ensure correct inferences
(i.e., to obtain consistent variance estimates), the empirical models are estimatedjointly with
a forecast equation for each anticipated regressor, following the suggestions of Pagan (1984
and 1986). To account for endogenous variables, instrumental variables are used in the
estimation of the empirical models. The instrument list includes two lags of output, two lags
of price, three lags of nominal GNP or GDP, 5 lags of the energy price, 5 lags ofthe real
exchange rate, 5 lags of the money supply, and 5 lags of government spending. The paper's
evidence remains robust with respect to modifications that alter variables or the lag length in
the forecast equations and/or the instruments list.
Following the suggestions of Engle (1982), the results of the test for serial correlation in
simultaneous equation models are consistent with the presence of first-order autoregressive
errors for some countries. To maintain comparability, it is assumed in all models that the
error term follows an AR(I) process. The estimated models are transformed, therefore, to
eliminate any possibility for serial correlation. The estimated residuals from the transformed
models have zero means and are serially independent.
- 28 -
APPENDIX II
II. DATA SOURCES
Countries under investigation include: Algeria, Argentina, Bangladesh, Bolivia, Brazil,
Chile, Colombia, Costa Rica, Cyprus, Ecuador, Egypt, EI-Salvador, Ethiopia, Gambia,
Ghana, India, Indonesia, Iran, Jordan, Libya, Malaysia, Oman, Pakistan, Paraguay, Peru,
Philippines, Qatar, South Africa, Sri Lanka, Syria, Tunisia, and Turkey.
The sample period for investigation is 1971-2000. Annual data for the above countries are
described as follows:
1. Real Output: Real output of GDP or GNP measured in terms of 1982 dollars.
2. The Price Level: The deflator for GDP or GNP.
3. The Energy Price: The price of Saudi Arabia oil.
4. Government Spending: Nominal values of all payments by the government.
5. Money Supply: the sum of currency plus demand deposits.
6. Real Exchange Rate: Real price of the domestic currency in U.S. dollar price, calculated
by multiplying the value of each country's currency in terms of the U.S. dollar (# of
dollar per unit of the country's currency) by the country's price level and then dividing it
by the U.S. price. A higher price represents appreciation of the currency. The U.S.
consumer price index is taken from the Bureau of labor statistics web site, www.bls.gov.
Sources: 1 through 5 are taken from the World Economic Outlook, data bank available from
the International Monetary Fund, Washington, D.C.
- 29REFERENCES
Agenor, Pierre-Richard, 1991, "Output, Devaluation and the Real Exchange Rate in
Developing Countries," Weltwirtschaftliches Archive, Band 127.
Bahmani, Mohsen, 1991, "Are Devaluation Contractionary in LDCs?" Journal ofEconomic
Development, (June).
Barbone, Luca, and Francisco Rivera-Batiz, 1987, "Foreign Capital and the Contractionary
Impact of Currency Devaluation, with an Application to Jamaica," Journal of
Development Economics, Vol. 26 (June), pp. 1-15.
Bruno, M., 1979, "Stabilization and Stagflation in a Semi-Industrialized Economy," in R.
Dornbusch and J. Frankel, eds. International Economic Policy, Johns Hopkins
University Press, Baltimore, MD.
Buiter, William H., 1990, International Macroeconomics, Oxford University Press.
Cooper, Richard N., 1971, "Currency Devaluation in Developing Countries," Essays in
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