This paper examines the impact of good governance on foreign direct investment (FDI) in the Latin... more This paper examines the impact of good governance on foreign direct investment (FDI) in the Latin American countries. Even though the FDI inflows in the region are relatively high, which can be explained by the level of development of the target countries, their connections with developed countries and the available natural resources, only a few papers have examined what kind of other factors make these countries more attractive for foreign investments. This study has two main goals. First, the gravity model is used to show whether the quality of governance measured by any of the World Governance Indicators (WGI) affects the inward FDI in Latin America. Second, following the recent trend in the gravity literature, the performance of different ordinary least squares (OLS) specifications are tested and compared to the Poisson pseudo-maximum likelihood (PPML) estimator which is a natural alternative approach. Results according to the most efficient estimation show that good governance ...
We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate ... more We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate curves are driven by a geometric spatial autoregression field. Strong consistency and asymptotic normality of the maximum likelihood estimators of the parameters are proved for stable no-arbitrage models containing a general stochastic discounting factor, where explicit form of the ML estimators is not available given a non-i.i.d. sample. The results form the basis of further statistical problems in such models.
We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate ... more We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate curves are driven by a geometric spatial autoregression field. Strong consistency and asymptotic normality of the maximum likelihood estimators of the parameters are proved for stable no-arbitrage models containing a general stochastic discounting factor, where explicit form of the ML estimators is not available given a non-i.i.d. sample. The results form the basis of further statistical problems in such models.
Járványtani és előrejelzési alapkutatásokat folytattunk jelentősebb almabetegségeken: almavarasod... more Járványtani és előrejelzési alapkutatásokat folytattunk jelentősebb almabetegségeken: almavarasodás (I), Monilia spp. (II), almafa lisztharmat (III) és Erwinia amlyovora (IV). I) - Varasodás konídiumok áttelelésének tisztázása, a fertőzési veszélyesség értékelése; - az aszkospórák ültetvényen belüli légtéri terjedése, a felvételezési mérőszámok közötti kapcsolat és felhasználhatóságuk az előrejelzésben; - időjárási elemek a ventúriás varasodás járvány modelljeiben; - a nyári fertőzések járványdinamikájának vizsgálata és szerepük tisztázása a következő évi járványok kialakulásában; - integrált és bio védekezési rendszerekre alkalmazható járványtani és előrejelző modellek kidolgozása; - a metszés és növény-egészségügyi prevenció hatékonyságának vizsgálata a varasodás elleni védekezésben. II) - M. polystroma és M. fructigena izolátumok cukor- és nitrogénforrásainak in vitro összehasonlítása; - járványdinamikai elemzések; - időjárás és rovarkártevők befolyásoló szerepe a járványok kiala...
ABSTRACT Two, 4-year studies on summer epidemic progress of apple scab were conducted at Randwijk... more ABSTRACT Two, 4-year studies on summer epidemic progress of apple scab were conducted at Randwijk, the Netherlands, from 1998 until 2001 and at Eperjeske, Hungary, from 2000 until 2003. Disease assessments were made on scab-susceptible cv. Jonagold. A range of nonlinear growth functions were fitted to a total of 96 disease progress curves (3 treatment classes x 2 plant parts x 2 disease measures x 4 years x 2 locations) of apple scab incidence and severity. The three-parameter logistic model gave the most consistent fit across three treatment classes in the experiment (integrated, organic-sprayed, and organic-unsprayed). Parameters estimated or calculated from the three-parameter logistic function were used to analyze disease progress. These were disease incidence and severity on the day of the first assessment (Y(s)); final disease incidence or upper asymptote for incidence (Y(if)) or severity (Y(sf)); fruit incidence and severity on day 40, after which no new lesions on fruits appeared (Y(40)); leaf incidence and severity on day 75, at which shoot growth stopped (Y (75)); relative (beta) and "absolute" (theta) rates of disease progress; inflection point (M); and area under the disease progress curve (AUDPC(S)) standardized by the duration of the total epidemic. Comparisons among disease progress curves were made by correlation and factor analysis followed by Varimax rotation. There were large differences but high positive correlations among the parameters Y(s), Y(f), theta, and AUDPC(S) across the three treatment classes. In the factor analysis, two factors accounted for more than 85% of the total variance for both incidence and severity. Factor 1 gave an overall description of epidemic progress of both scab incidence and severity and included the parameters Y(f), Y(40), Y(75), theta, and AUDPC(S). Factor 2 identified a relationship between the relative rate parameter (beta) and the inflection point (M) for severity and a relationship between disease incidence and severity. For an integrated or an organic orchard, theta, AUDPC(S), and one of Y(f) or Y(75) (because of the link with host phenology) can characterize apple scab epidemics during summer. Based on these findings, improved scab management approaches were provided for integrated and organic apple production systems.
This paper examines the impact of good governance on foreign direct investment (FDI) in the Latin... more This paper examines the impact of good governance on foreign direct investment (FDI) in the Latin American countries. Even though the FDI inflows in the region are relatively high, which can be explained by the level of development of the target countries, their connections with developed countries and the available natural resources, only a few papers have examined what kind of other factors make these countries more attractive for foreign investments. This study has two main goals. First, the gravity model is used to show whether the quality of governance measured by any of the World Governance Indicators (WGI) affects the inward FDI in Latin America. Second, following the recent trend in the gravity literature, the performance of different ordinary least squares (OLS) specifications are tested and compared to the Poisson pseudo-maximum likelihood (PPML) estimator which is a natural alternative approach. Results according to the most efficient estimation show that good governance ...
We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate ... more We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate curves are driven by a geometric spatial autoregression field. Strong consistency and asymptotic normality of the maximum likelihood estimators of the parameters are proved for stable no-arbitrage models containing a general stochastic discounting factor, where explicit form of the ML estimators is not available given a non-i.i.d. sample. The results form the basis of further statistical problems in such models.
We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate ... more We consider discrete time Heath-Jarrow-Morton type interest rate models, where the interest rate curves are driven by a geometric spatial autoregression field. Strong consistency and asymptotic normality of the maximum likelihood estimators of the parameters are proved for stable no-arbitrage models containing a general stochastic discounting factor, where explicit form of the ML estimators is not available given a non-i.i.d. sample. The results form the basis of further statistical problems in such models.
Járványtani és előrejelzési alapkutatásokat folytattunk jelentősebb almabetegségeken: almavarasod... more Járványtani és előrejelzési alapkutatásokat folytattunk jelentősebb almabetegségeken: almavarasodás (I), Monilia spp. (II), almafa lisztharmat (III) és Erwinia amlyovora (IV). I) - Varasodás konídiumok áttelelésének tisztázása, a fertőzési veszélyesség értékelése; - az aszkospórák ültetvényen belüli légtéri terjedése, a felvételezési mérőszámok közötti kapcsolat és felhasználhatóságuk az előrejelzésben; - időjárási elemek a ventúriás varasodás járvány modelljeiben; - a nyári fertőzések járványdinamikájának vizsgálata és szerepük tisztázása a következő évi járványok kialakulásában; - integrált és bio védekezési rendszerekre alkalmazható járványtani és előrejelző modellek kidolgozása; - a metszés és növény-egészségügyi prevenció hatékonyságának vizsgálata a varasodás elleni védekezésben. II) - M. polystroma és M. fructigena izolátumok cukor- és nitrogénforrásainak in vitro összehasonlítása; - járványdinamikai elemzések; - időjárás és rovarkártevők befolyásoló szerepe a járványok kiala...
ABSTRACT Two, 4-year studies on summer epidemic progress of apple scab were conducted at Randwijk... more ABSTRACT Two, 4-year studies on summer epidemic progress of apple scab were conducted at Randwijk, the Netherlands, from 1998 until 2001 and at Eperjeske, Hungary, from 2000 until 2003. Disease assessments were made on scab-susceptible cv. Jonagold. A range of nonlinear growth functions were fitted to a total of 96 disease progress curves (3 treatment classes x 2 plant parts x 2 disease measures x 4 years x 2 locations) of apple scab incidence and severity. The three-parameter logistic model gave the most consistent fit across three treatment classes in the experiment (integrated, organic-sprayed, and organic-unsprayed). Parameters estimated or calculated from the three-parameter logistic function were used to analyze disease progress. These were disease incidence and severity on the day of the first assessment (Y(s)); final disease incidence or upper asymptote for incidence (Y(if)) or severity (Y(sf)); fruit incidence and severity on day 40, after which no new lesions on fruits appeared (Y(40)); leaf incidence and severity on day 75, at which shoot growth stopped (Y (75)); relative (beta) and "absolute" (theta) rates of disease progress; inflection point (M); and area under the disease progress curve (AUDPC(S)) standardized by the duration of the total epidemic. Comparisons among disease progress curves were made by correlation and factor analysis followed by Varimax rotation. There were large differences but high positive correlations among the parameters Y(s), Y(f), theta, and AUDPC(S) across the three treatment classes. In the factor analysis, two factors accounted for more than 85% of the total variance for both incidence and severity. Factor 1 gave an overall description of epidemic progress of both scab incidence and severity and included the parameters Y(f), Y(40), Y(75), theta, and AUDPC(S). Factor 2 identified a relationship between the relative rate parameter (beta) and the inflection point (M) for severity and a relationship between disease incidence and severity. For an integrated or an organic orchard, theta, AUDPC(S), and one of Y(f) or Y(75) (because of the link with host phenology) can characterize apple scab epidemics during summer. Based on these findings, improved scab management approaches were provided for integrated and organic apple production systems.
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Journal articles by Jozsef Gall
Papers by Jozsef Gall