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ISSN 0932-4569
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137
Behavioral Equity
by
Yuval Feldman and Henry E. Smith∗
The paper uses the findings of psychology, behavioral economics, and behavioral
ethics to revisit three main related assumptions of the rational-choice approach to
equity, by developing three main points: first, not only bad people try to circumvent the law; second, behavior depends on the relationship between specificity,
trust, and the type of motivation triggered; and, third, moral priming has different
effects on good and on bad people. Based on these three modifications of rationalchoice assumptions about the law-versus-equity distinction, we offer a dynamic
acoustic separation model that attempts to examine the effect of law versus equity
on both good and bad people. (JEL: D80, D23, K00, K11, K42)
1 Introduction
In many situations legal systems use ambiguous standards and moral language in
instructing people how to behave. In the realm of the common law, much of this
ambiguous, morally inflected legal component is associated with “equity.” In civil
law systems, something similar goes under the banner of “abuse of right” or “abuse
of law.” According to this approach, part of the presumed advantage of equity is
related to its ability to prevent opportunism by limiting the ability of people to
exploit loopholes in specific rules to their advantage. Most of the current research
on ambiguity and vagueness in the law follows a rational-choice approach, where
ambiguity is expected to increase the cost of deciding how to behave. This increase in
the cost of learning is intended to nudge people toward greater compliance, assuming
a certain risk aversion on their part. Another assumption of this perspective is that
ambiguity is more likely to harm bad-faith people than good-faith ones because the
former have greater difficulty circumventing an ambiguous law.
∗ Yuval Feldman (corresponding author): Associate Professor of Law, Bar-Ilan University and Fellow, Edmond J. Safra Center for Ethics, Harvard University, Cambridge
(MA); Henry E. Smith: Fessenden Professor of Law, Harvard Law School, Cambridge
(MA). Financial support for this study was provided by the Israel Science Foundation
(grant 1283/11) and The Edmond J. Safra Center for the study of Ethics. The authors
would like to thank Ryan Galisewski and Einav Tamir for excellent research assistance.
Journal of Institutional and Theoretical Economics 170, 137–159 – ISSN 0932-4569
DOI: 10.1628/093245614X13871984730889 – 2014 Mohr Siebeck
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The present paper challenges these behavioral assumptions and the legal paradigms
that are based on them. We use the findings of psychology, behavioral economics,
and behavioral ethics to revisit three main related assumptions of the rational-choice
approach to equity, by developing three main points: first, not only inveterate opportunists try to circumvent the law; second, behavior depends on the relationship
between specificity, trust, and the type of motivation triggered; and, third, moral
priming has a different effect on good-faith and bad-faith people.
A word on terminology is in order. Because the literature on behavioral ethics
has recently focused on good people who mindlessly end up doing much of the bad
behavior that legal policymakers try to prevent, we think the terms “good faith” and
“bad faith” capture the needed distinction between types of behavior and the persons
who typically engage in them. Bad-faith actors are those who mindfully choose to
engage in bad behavior so long as it enhances their self-interest. A bad-faith person
takes moral and legal norms as merely external constraints. A good-faith person
is one who has internalized moral norms and is inclined to act on them. As in
the legal literature, we can distinguish between acting in good faith and bad faith,
although we do not wish to imply that the law always perfectly captures the relevant
distinction. We do not endorse the idea that law should be evaluated only as an
external constraint. Nor do we take a position on what the content of moral norms
should be, and we need not assume that people’s character is fixed once and for
all. On the contrary, we will draw on the psychological literature in distinguishing
contexts in which people can be expected to behave in a good or bad way. So, for
example, announcing a modest fine that crowds out intrinsic motivation tends to
shift people from good to bad mode. This does not imply a deep ethical theory
about the ultimate merits of responding to a modest fine in this way, but it does say
something useful about human behavior, particularly when it comes to legal design.
Based on these three modifications of rational-choice assumptions about the
law-versus-equity distinction, we suggest two normative prescriptions: first, we
offer a dynamic acoustic-separation model that attempts to examine the effect
of law versus equity on both good-faith and bad-faith people; and second, we
sketch an initial taxonomy of the optimal mixture of law versus equity. It should be
acknowledged that while we speak about equity, which is usually dealt with in the
context of courts’ discretion, our focus is broader and deals also with informing the
optimal discretion given to various bodies in the executive branch. For us, equity is
a mode of decision-making that is not confined to courts.
2 Law versus Equity
As mentioned, one of the main attributes of equity is that it tends to use ambiguous
standards when instructing people how to behave in legally relevant situations.
According to this approach, part of the presumed advantage of equity is related
to its ability to prevent opportunism by limiting the ability of people to exploit
loopholes in specific rules to their advantage.
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The first assumption that we will challenge is that only bad-faith people try
to circumvent the law. We show that, according to a rich literature, many of the
opportunistic deeds that we care about can be attributed to behaviors lacking both
full intention and an awareness that the law is being violated. We argue further that
to some extent, in contrast to the classic risk-aversion argument, legal ambiguity
can lead to lower levels of compliance.
The second, somewhat contradictory point focuses on the relationships between
specificity, trust, and the type of motivation triggered. We suggest that in some
contexts the type of motivation is important for the likelihood that one will engage
in performance that is better than mere compliance. We argue further that ambiguity
can at times cause good-faith people to behave better rather than worse, for example,
when specificity would crowd out intrinsic motivation.
The third behavioral point focuses on the difference in the effect of moral language
on good-faith versus bad-faith people. We argue that the effect of equity in increasing
performance, protecting compliance, and reducing attempts at evasion accounts not
only for its equity’s ambiguity but also for its moral language. We argue further that
because behavioral research suggests that not all people are expected to respond
to moral language in similar ways, such language may be used to trigger different
motivations for compliance.
Based on these modifications of the assumptions of rational choice regarding the
role of equity, we proceed in two directions. First, we show that for good-faith people
ambiguity should focus on granting discretion ex ante (no crowding out); specific
rules are then expected to constrain unintentional motivated reasoning. By contrast,
for bad-faith people ambiguity provides specific rules ex ante, while letting them
know about the discretion of the courts to review behavior ex post, which is intended
to prevent them from exploiting the law. We offer a dynamic acoustic-separation
model to examine the effect of law versus equity on both good-faith and bad-faith
people, and explore the possibility that by using equity in a behaviorally informed
way we can provide different messages to the two types of people at the same time.
We suggest a richer model than the current rational-choice one, because in our model
a combination of ambiguous standards, specific rules, and moral language can help
manage the behavior of people with multiple motivations rather than merely that of
bad-faith people who are intentionally looking for ways to evade the law.
Second, we replace the common dichotomy between compliance and noncompliance with a trichotomy among three aspects of behavior: performance, compliance,
and evasion. Performance is the most desired level of behavior; to achieve it, ambiguity must reduce crowding out of intrinsic motivation. Compliance is the second
desired dimension, referring mostly to people following specific rules in a concrete way. Evasion is the least desired behavior, which happens intentionally or
unintentionally. We show that the models accounting for the interplay between law
and equity can be improved by distinguishing performance, compliance, and evasion. For example, only when recognizing the difference between compliance and
performance is it possible to recognize the risk of crowding out the motivation of
people through overly specific rules. The balance among evasion, compliance, and
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performance should be different for good-faith and bad-faith people, but the basic
mixture of law versus equity can handle this three-way trade-off by sending the
same message at times to good-faith and bad-faith people alike, who will receive it
as different messages.
3 Current Views of Law versus Equity
Traditionally, the issue of specificity in the law was framed in part as law versus
equity. At one time, separate courts in the Anglo-American world meted out a special, individualized, morality-based justice, following a tradition of equity going
back to Aristotle, who developed the idea of a special equitable kind of justice.
In the Nicomachean Ethics, Aristotle declared that equity corrects “law where law
is defective because of its generality” (Aristotle, transl. 1982, book 5, chapter 10,
p. 317). Commentators adopted this idea when explaining equity as a branch of the
law (broadly conceived), and many courts have also cited this tradition. Aristotle
drew an analogy between equity and the leaden rather than iron measuring rulers of
the builders of Lesbos, which bend according to the shape of the stone and allow the
selection of a stone that fits. Courts also invoke this image when they are inclined
to dispense individualized, ex post justice. Equity is specific and ex post, but it is
couched in vague ex ante terms based on principles such as good faith, clean hands,
and not profiting from one’s own wrongdoing.
This view of equity, as being necessarily more ex post-specific than the law
because the law is defective owing to its generality, leaves open many questions.
Exactly how and when does the law fail on account of its generality? A broad version
of equity would hold that legislators cannot anticipate the future, and therefore
every time a law does not accord with the intent of the legislator, equity should
intervene to make things right. A much narrower version of equity would regard
it as a device to use against opportunists, “gamers,” and loophole seekers using
their knowledge, which is superior to that of the legislator or of a contractual
partner, to take unintended and difficult-to-foresee advantage of the law. To forestall
these activities, equity must be specific, but only in an ex post way. Ex ante, the
language of equity is general, and the proxies it uses, such as disproportionate
hardship, are not completely tailored to the problem they are intended to target:
opportunism (Smith, 2010). Interestingly, Aristotle’s equity can be interpreted as
directed against opportunists who take advantage of the gap between the law and
its purpose (Klimchuk, 2011). Various intermediate positions are also possible,
according to which equity is aimed at preventing misuse of the law, where misuse is
based on moral concepts. All these versions of equity, save perhaps the most general
ones, share a notion that equity is aimed at particular people acting inequitably out
of illegitimate motives. In other words, if equity courts are “courts of conscience,”
the motivation of the actors matters.
In our opinion equity is much broader than ambiguity because it focuses also
on the discretion of the courts, the types of argument they can consider, and moral
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language, but ambiguity is clearly the main concept through which we can communicate with the current literature.
3.1 Rules versus Standards
There are few paradigms that address the notion of optimal specificity. The most
familiar parallel to the law-versus-equity distinction is that of rules versus standards.
In law and economics, the distinction between rules and standards is manifest on
one dimension: the timing of decision-making (Kaplow, 1992), which captures
the differential cost of creating and enforcing directives and the role of ex post
discretion. The technique espoused by those interested in institutional design focuses
on how best to design rule systems to take advantage of the various capacities of
legal decision-makers (Sunstein, 1995). For example, Sunstein argues that because
legislatures cannot anticipate all of the circumstances in which they will affect
people, judges use a process of analogical casuistry to ensure that the proper result
is achieved in each case. By contrast, a highly influential movement in legal academia
has vigorously argued against conferring discretion on judges because it prevents
the law from being predictable (Alexander and Sherwin, 2001; Scalia, 1989). Rather
than focus on certain aspects of rules or standards and on how much trust to place in
different actors in the system, another group of scholars has emphasized the overall
costs and benefits of applying rules or standards, usually through economic models
(Kaplow, 1992, 1995; Ferguson and Peters, 2000). Kaplow’s paradigm and various
follow-up studies have focused mainly on the rational-choice view of human nature,
translating the notion of optimal specificity mainly into optimization of information
costs. Many legal scholars have written about the relative benefits of rules and
standards,1 although little of the literature has focused on the effect of the choice of
standards or rules on how legal actors make decisions.
The rational-choice view of the effect of vagueness or ambiguity on legal compliance is for the most part one of chilling, leading individuals to engage in overcompliance (e.g., Logue, 2007, notes theoretically that risk aversion is possible in
the tax world, where there is legal uncertainty and a high penalty; see also Garoupa,
2003). These models of the chilling effect of vagueness are of two sorts. In one
model, vagueness is chilling and undesirable but carries with it tightly correlated
benefits, like raising litigation costs. Thus, parties may even choose to include vague
terms in their contracts if these make litigation non-cost-effective (e.g., Choi and
Triantis, 2008, 2010; Triantis, 2002). In this case, better targeting of the vague terms
is pointless because the benefits of vagueness are in the imposition of costs. The
question is the balance between the costs and the benefits.
1 Some classical works that propose various frameworks for thinking about the difference between rules and standards are Kennedy (1976), arguing in particular that
rules are connected to the ideology of individualism, whereas standards are connected
to that of altruism; Sullivan (1992), showing how the rule–standard dichotomy is used
rhetorically in American constitutional adjudication; and Schlag (1985).
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Another class of models based on rational actors regards vagueness as causing
chilling behavior and raising information costs, but considers the benefits it brings
in regulating behavior to be at least separable to some extent. That is, these models
do not see the benefits of vagueness as flowing directly from the costs it imposes, but
rather as arising despite its costs. Models that see a benefit in using vague standards
against seekers of loopholes consider the main trade-off to be between punishment
and the chilling effect on legitimate behavior (Ferguson and Peters, 2000).2 This
trade-off is made worse by the fact that vagueness cannot be targeted against opportunists. To the extent that it can – and that it is perceived that it can – the chilling
effect can be reduced (Bar-Gill and Ben-Shahar, 2009). In particular, if ordinary,
garden-variety actors have higher information costs for figuring out whether contractual performance is not merely valuable but also technically compliant, they are
vulnerable to cross-subsidies for opportunists who can sue for satisfactory but not
technically compliant performance. Equity, if it is targeted at the latter but not so
broad as to invite its own form of opportunism, can deter opportunism sufficiently
so that the garden-variety actors will be willing to contract, thereby achieving a
substantive compliance equilibrium, in which less costly and equally valuable but
technically nonconforming performance can be achieved (Ayotte, Friedman, and
Smith, 2013).
Both types of models, those in which vagueness is inextricably bound up with
chilling and those in which multiple audiences can be affected in various ways,
are consistent with the rational-actor paradigm. Even the models that distinguish
between types of actors do so based on their costs of information. Actors can
assess a set of possible outcomes and assign at least a default probability to them.
Ambiguity – a case in which an actor cannot quantify probabilities or identify the
state space – does not figure in these models.3
We argue that there is a way out of the dilemma between tractability and psychological realism. The law has long differed along various dimensions, with apparently
different audiences of actors and different situations in focus at various points. One
such dimension is specificity: should the law announce its directives in general
or in specific terms? The view that we take here, according to which ambiguity
leads to less compliance, has long been recognized in the literature. For example,
some applied research identified the dilemma associated with optimal specificity of
law even before the research on behavioral ethics. Nelson (2003) focuses on two
dimensions associated with the specificity of rules: their ability to communicate
clear information and their ability to constrain behavior. Nelson suggests that opportunistic behavior is more likely to be constrained by broader standards because
2 Ferguson and Peters assume that the same rule will govern both ordinary actors
and loophole seekers and that it will be received by each group in a similar, chilling
way. The authors show that nevertheless an Orwellian equilibrium can be more efficient than one with clear rules.
3 For an argument that uncertainty rather than risk is at the heart of the problem of
opportunism, see Smith (2010). Oliver Williamson (1985) identifies uncertainty as an
opening for opportunism.
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highly specific rules call for finding various types of safe harbors. Bratton (2003)
also argues that systems of principles are more costly because they lack certainty.4
A sophisticated approach appears in the seminal work of Braithwaite (2002) on rules
and principles. Braithwaite suggests that too many specific rules create subjectively
an overall lack of certainty that harms the law in the long term.
3.2 The Rational-Choice Approach: Equity as an Enforcement Tool against BadFaith Individuals
According to the rational-choice assumption about compliance, an individual will
violate the law “if and only if his expected utility from doing so, taking into account
his gain and the chance of his being caught and sanctioned, exceeds his utility if
he does not commit the act” (Polinsky and Shavell, 2000, p. 47). The decision is
based on the individual’s preference for risk, the probability of punishment, and
the utility expected with and without punishment (Garoupa, 1997, p. 268). Under
the rational-choice theory, optimal enforcement overdeters; policymakers must take
into account the costless deterrence of risk aversion.5
Consistent with the rational-actor paradigm, equity can be seen as a mode of
decision-making aimed at discouraging opportunism (Ayotte, Friedman, and Smith,
2013; Smith, 2010). The various features of equity work in tandem to act as a safety
valve on the relatively simple structures of law.
Opportunism is near-fraud in two senses. It covers situations in which some proxy
for fraud is present, and we intervene to deter actual fraud. In addition, it covers
situations in which actual fraud may be absent but someone uses deception by taking
unforeseen and unfair advantage of the letter of the law or of another rule to gain
a larger share of a smaller surplus.
Equity as a safety valve is multidimensional. In addition to the timing of decisionmaking, at least three other dimensions are crucial to antiopportunism: moralism,
domain of foreseeability, and local application.
Equity is based on moral notions. Opportunism is considered immoral. Basing
equity on moral consensus makes it more predictable. The use of moral standards
is consistent with using on–off remedies (injunctions, disgorgement), or sanctions
as opposed to prices (see Cooter, 1984). Appeals to morality may seem vague, but
morality itself may need to be a little vague to prevent evasion, although it is not so
vague to those with background knowledge.
The domain of equity has to do with foreseeability. Opportunism is a problem
because an actor has found an unforeseen and ex ante unforeseeable way to take
advantage.6 As related to foreseeability, equity requires widening the contextual
frame. If an opportunist steps outside the domain of the foreseeable to take advantage, equity must widen the frame to include this context. For example, if someone
4
5
6
His argument is more complex and depends on various other factors.
See Garoupa (1997, p. 279), quoting a result by Polinsky and Shavell.
The problem of opportunism may be an example of ambiguity (uncertainty)
rather than a quantifiable risk (Smith, 2010).
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brings up a technicality such as not being an adult in order to void a contract, equity
will not enjoin the jilted contractual partner from interfering with the opportunist’s
new contract.7
Equity applies locally. It is a safety valve. Traditionally it applied in personam. For
example, an injunction is directed at specific persons before the court and at those
acting in concert with them. Equity was not intended to disrupt general rules, and it
often enforces customs that apply only locally in a certain industry or community.
These four dimensions – timing of decision-making, moralism, domain of foreseeability, and local application – are all related and reinforce each other, although
this systemic aspect is more difficult to show. The vagueness and judicial discretion
are necessary in order to “keep up” with the opportunist, and equity can do this
better by being the second-mover.
The safety-valve perspective assumes that a hybrid system of generally applicable
rules provides firm entitlements on which good-faith actors can rely, and allows
judges to employ equitable standards in particular disputes to sanction opportunists
taking advantage of the over- or underinclusiveness of the rules (Smith, 2010). (The
concept of acoustic separation seems to fit here too, because the public is given
a general rule on which to rely, but judges hear individual cases in order to apply
the rule equitably.8 )
4 Behavioral Modifications: Extending the Effect of the Law-versus-Equity
Debate to Good-Faith People
The law is often seen as treating human beings as interchangeable recipients of legal
commands. This is especially true of traditional law and economics. The problem
is not only the narrowness of some versions of the rational-actor paradigm. Some
critics fault the rational-actor paradigm for taking preferences as given: surely,
external factors, including the law itself, can shape preferences. Others point to
motivations other than material gain and loss, or to motivations other than external
constraints such as fear of punishment, as important in shaping human behavior.
The most sophisticated of these critiques recognize that different people may be
motivated differently, or that the same person may be motivated differently in
different situations. But if we allow preferences to change, people to vary, and
individuals’ motivations to reflect contextual cues, the factors influencing people
turn out to be many and to point in many, often opposing directions. Human behavior
seems to be chaotic.
Below we briefly present the relevant findings of behavioral scholarship on the
topic and try to resolve the puzzle about the conflicting effect of ambiguity that arises
7
8
Carmen v. Fox Film Corp., 269 F. 928 (2d Cir. 1920).
See Sunstein (1995, pp. 1006f.), describing as acoustic separation Bentham’s proposal for clear rules announced to the public and judicial adaptation of the rules in individual cases.
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in the literature by paying closer attention to predictions that may be generated from
the theories.
The limitations of the rational-choice theory were recognized by law-and-economics scholars themselves. For example, Shavell, one of the founding fathers of law
and economics, showed in his paper on law versus morality as regulators of conduct
(2002) that morality has many advantages over external sanctions, mostly because
it is likely to provide more accurate sanctions for every misconduct. Nevertheless,
for the most part Shavell’s focus is on individual morality rather than on designing
laws in a way that appeals to morality. Cooter, another leading scholar in law and
economics, has focused in much of his writing on the expressive function of law and
on the importance of intrinsic motivation in legal compliance. Cooter recognized
that when compliance is based on intrinsic motivation, it is more likely to lead to
a stable equilibrium (Cooter, 2000).
Moving from rational-choice accounts of motivation and compliance to the behavioral literature, we can make better use of some recent developments in the
behavioral literature on human rationality, which provide useful paradigms for revisiting this question. In the behavioral literature, as in the rational-choice literature,
we find conflicting predictions about the effect of ambiguity. On the one hand,
theories such as crowding out, trust, monitoring, and control all support less specificity, and on the other hand, theories such as elastic justification, dishonesty, and
motivated reasoning all support more specificity.
We attempt to solve this tension by suggesting a possible variation in the effect
of ambiguity on two aspects of behavior that the law seems to care about: performance and compliance. Most current research suggests that ambiguity is expected to
increase performance but decrease compliance. Based on these theoretical accounts
and on empirical findings, we present a broader perspective of the effects of legal
ambiguity on individuals, allowing us to improve the integration of equity-related
concepts in law. Because the psychological perspectives on equity are too numerous
to be included in a model, we focus on three components:
(1) Ambiguity as blurring the difference between good-faith and bad-faith people.
(2) Specificity as crowding out intrinsic motivation and therefore leading people
from evasion to compliance, but undermining performance. According to this
perspective, the combination of good-faith people, moral language, and ambiguity can increase the likelihood that the good-faith people will engage in
performance.
(3) Morality as more likely to improve the behavior of good-faith than of bad-faith
people.
We will show that three trends of the recent literature on motivation and cognition
can inform the treatment of good-faith people rather than just focusing on the
bad-faith individuals.
Differential specificity according to motivation serves as our starting point. In the
face of the potential welter of situations, motivations, and types of legal commands,
we ask whether certain combinations of generality and specificity in well-known
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types of situations are called for in light of recent results in the study of motivation.
As the common law tends to do, we work from the bottom up.
4.1 Ambiguity, Good-Faith People, and Evasion
In recent years, many behavioral ethics scholars have documented that good-faith
people are the ones responsible for most opportunistic deeds (Hollis, 2008; Kidder,
2009; Bersoff, 1999; Mazar, Amir, and Ariely, 2008; Pillutla, 2011; and Banaji
and Greenwald, 2013).9 Although some accounts of human nature by writers such
as Lynn Stout (2011) and Yochai Benkler (2011) try to argue for a greater focus
on good-faith people, the majority of the literature seems to focus on the reverse
side, where opportunistic deeds are done by good-faith people who fail to recognize
that their deeds are opportunistic (e.g., Bazerman and Tenbrunsel, 2011; Banaji and
Greenwald, 2013). Importantly in this vein, Bandura applies a moral disengagement paradigm to the area of employee misbehavior. Bandura (1999) suggests this
paradigm, not in the context of ethics in the organization, but with reference to the
active role that the self plays in allowing people to engage in inhumane behavior.
Bandura offers eight mechanisms by which individuals are able to convince themselves that their actions are not immoral, thereby preventing the self-sanctions that
individuals would normally apply to keep their actions consistent with their personal
ethical standards. The mechanism relevant to ambiguity is the use of euphemistic
labeling to reclassify an action like stealing into a more innocuous one like “shifting
resources.” Moore et al. (2012) make more concrete application of the self-deception
mechanisms that people employ to justify their opportunistic behaviors. Their work
arguably relates to legal ambiguity, in that exploiting ambiguity in rules is central
to people’s ability to justify immoral behavior. A similar view appears in the works
of Ayal and Gino (2011) and of Ashforth and Anand (2003), who focus on creative
ways people use to justify doing wrong.
One of the main techniques people use to justify unethical behaviors to themselves is to engage in constructing self-serving interpretations of the legal and
organizational requirements they must follow. Psychological processes such as selfdeception, elastic justification, moral wiggle room, moral disengagement, and motivated reasoning support the view that people may be able to exploit legal ambiguity
to behave unethically without feeling that they are in violation of the law. Two
relevant concepts that support this notion come from Haisley and Weber (2010),
who find that people prefer to take ambiguous risks when this allows them to justify
unfair behavior, and from Dana, Cain, and Dawes (2006), who find that people
are less generous in situations in which they can appeal to moral ambiguity in explaining their actions. Similarly, Hsee (1995) has found evidence that people make
choices that satisfy their preferences, at the cost of best achieving an assigned goal,
if they can exploit existing ambiguity about which decision may complete the as9 Many others do not use the term “good people” in their titles but make the same
argument in the text (for example, Desmet, De Cremer, and Van Dijk, 2011). For a review of the focus on good people in recent literature, see Feldman (2013).
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signment. Elsewhere (Feldman and Teichman, 2009; Feldman, 2011, 2013) one of
us has shown that people use legal ambiguity strategically to formulate a minimal
interpretation of what is required from them by laws or contracts.
4.2 Ambiguity, Good-Faith People, and Performance
Some scholars have shifted the focus from analyzing the costs and benefits of
applying rules or standards, and from making certain baseline assumptions about
how actors will behave (usually in their rational best interest), to making substantive
inquiry into the process through which actors grapple with legal rules and standards
before making a decision. For example, Alexander and Sherwin (1994, p. 1212)
have argued that when rules are not serious – that is, they do not in all situations
accurately dictate what an actor should do – people are less likely to follow the letter
of the law.10 In this tradition of moral education, Shiffrin (2010, pp. 1222–1225)
has argued that vague standards that incorporate moral concepts encourage “moral
deliberation,” a more careful decision-making mode in which actors grapple with
moral concepts, promoting stronger community morals and democratic engagement
with the substance of the law.11 However, to the extent that the moral component
of law can be subsumed into typical rationality analysis,12 these considerations do
not directly answer the question of how the specificity of a rule (or the vagueness
of a standard) affects an actor’s behavior.
Other legal scholars have advocated a similar favorable view of legal ambiguity,
but based more on the psychological process of decision-making. For example,
Feldman and Lifshitz (2011) focus on the advantages to people’s authenticity of
masking the certainty of legal benefits, that is, focusing theoretically and empirically
on the injunction effect triggered by legal uncertainty. Similarly, Dagan and Fisher13
suggest that legal ambiguity is one way of avoiding the commodification effects
of the law. These views are also supported behaviorally by recent research by
Chou, Halevy, and Murnighan (2010) on the negative behavioral effects of the
specificity of contracts on people’s cooperation and trust. Following a series of
studies that examine how people perceive specific contracts, the authors argue that
a crowding-out effect is associated with specificity. A preference for incomplete
contracts is also demonstrated in the work of Fehr and Gächter (2000) and supported
by an earlier study by Tenbrunsel and Messick (1999), whose broader point is that
strict enforcement, sanctions, and specificity can harm cooperation. A similar view
10 “If citizens learn that rules are not statements of right action in all cases, but
only statistical calculations of right action over a range of cases, they will be more
likely to exercise their own judgment in particular cases, and errors will increase.”
11 See also Sunstein (1995, pp. 995f.), arguing that participation in a hearing, in
addition to giving a claimant individual treatment, furthers the goal of democratic participation of those affected by rules; and Smith (2010), arguing that an essential part of
the system of equity is the moral component of equitable adjudication.
12 See Shavell (2002), making such an attempt; see also Kaplow and Shavell
(2007).
13 “The State and the Market,” on file with authors.
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is supported by Falk and Kosfeld (2006), who demonstrated this broader point
using a principal–agent experiment in which participants could either let the agent
decide the production amount or set a lower boundary. In settings in which a lower
boundary was set, agents produced less than in those in which the principal left the
decision about the production amount entirely in the hands of the agents. In post
hoc questioning, agents said that they regarded the lower boundary as a sign of
distrust and were therefore less cooperative. Many of the studies on the crowdingout effect of incentives and on enforcement are summarized by Bowles (2008; see
also Feldman, 2011).
4.3 Moral Language and Good-Faith versus Bad-Faith People
If specificity can crowd out both motivation and cognition, in mirror fashion moral
language can “crowd in” intrinsic motivation, especially among good-faith people.
Tom Tyler (2006), in his research on why people obey the law and in various followup studies (Tyler and Fagan, 2008; Wenzel, 2002; and Gibson, 2007),14 has shown
the importance of noninstrumental motivation, such as fairness in accounting, for
compliance and performance. Some of the studies conducted in this tradition seem to
build the behavioral foundation for the possibility of using the differences between
types of people, in particular the differential likelihood that morality in the law has
an effect on their behavior. The leading paper in this line of reasoning is by Aquino
et al. (2009), who demonstrates that people who are high on moral identity (in our
terminology, good-faith people) are likely to be affected by moral priming, whereas
moral priming was found to have no effect on people who are low on moral identity
(in our terminology, bad-faith people).
5 A Model of Behavioral Equity
In this part we develop a model of law and equity that makes crucial use of the
insights of behavioral psychology. We go beyond the rational-actor paradigm by
allowing ambiguity to have different effects on good-faith and on bad-faith people
and to vary in the extent of its effect within each group, depending on factors such
as whether the law is aligned with the purposes of the group members. To obtain
this resolution requires unpacking motivation in a way that the classic rational-actor
paradigm avoids. At first, such an approach may appear unpromising because the
psychological literature seems to imply that the ambiguity of legal directives has to
do with very fine-grained cues that point in different directions, making them useless
for designers of legal directives. We argue that law and equity, both traditionally
and even more so as a functional theme in the law, permit one to thread the needle
between the fine grain of motivation to benefit from the mechanisms identified in
14 For an empirical demonstration of the limits of traditional economic models in
the context of legal compliance, see Feldman and Teichman (2009).
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the psychology literature on one hand, and sufficient simplicity to implement its
insights so as to be realistic on the other.
Both behavioral economics and behavioral ethics point to the need to analyze
situations with a finer grain keyed to the actors’ motivations, and indicate that
the nature of the legal directive, including its specificity and moral content, induces
different behavior in different actors. This seems like a counsel of despair. Especially
dispiriting is the idea that the legal directive may disturb initial motivation, making
the consequences of specificity and moral language in a directive difficult to trace.
One may think that the law, if it is to deal on this level at all and not simply ignore
the problem, would have to differentiate situations very finely, based on a variety
of features, including those of the actors involved in those situations, and issue
directives one by one to cover a vast and varied field. This is not an appealing
prospect, both because such a system would be costly to devise and update, and
because it runs the risk of sending confused messages to legal actors. How could the
law target narrow types of situations and particular types of actors with their varied
motivations in this situation-by-situation fashion?
We suggest that there is a way out of this problem, and it involves combining
the notion of acoustic separation with the behavioral considerations that inform our
taxonomy. Managing the complex psychological problem with the relatively simple
legal technology relies on a cluster of ideas about how different legal actors receive
the messages of the law. Central to our model is the idea that the same message
can have a different impact on different legal actors, depending on their motivations
and focus. All legal directives are intended to reach an audience. Not all members
of the audience are similar in relevant respects. At the most basic level, a recipient
of a message extracts more or less information from a given message depending on
how much information the recipient already has.15 For example, if A knows that C
lives in Illinois but B does not know it, and both A and B receive the message that C
lives in Springfield (a common town name in the U.S.), then A knows where C
lives but B does not. In the legal system, information directed at knowledgeable
actors can be more compressed and skeletal because of the information the actor
already possesses (Smith, 2003). Thus, patent law presupposes more knowledge in
duty bearers than does copyright, and by extension, the duties under a contract are
allowed to be much more detailed and idiosyncratic than is the content of in rem
property rights.
Sometimes the division of law into audiences can lead to separate messages
being received by multiple audiences without excessive interference between the
messages, even if there is tension between them. This has been dubbed acoustic
separation by Meir Dan-Cohen (1984), who has explored the idea in criminal law.
In Dan-Cohen’s model, the law can in principle send two separate messages to two
separate audiences. Thus, the law consists of conduct rules directed at primary actors
15 “What one learns, or can learn, from a signal [...] and hence the information
carried by that signal, depends in part on what one already knows about the alternative
possibilities” (Dretske, 1981, p. 43).
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(the public) and decision rules aimed at guiding legal decision-makers (especially
judges). Criminal law may be couched in a way that sounds categorical to the
ordinary observer, but that signals to judges when leniency is called for. According
to Dan-Cohen, the linguistic form of a rule does not determine its function, and
the two functions can be served by different rules as long as there is not too
much crosstalk – in other words, if there is acoustic separation between the two
audiences.
For the present paper, the multiple potential audiences are groups of primary
actors rather than primary actors versus official decision-makers. Moreover, we
argue that the same literal message is received by both groups, but what they derive
from it depends on their motivation and focus. In our understanding, the problem
that behavioral considerations pose is the potential for too many types of rules and
audiences, with the greater attendant danger of acoustic nonseparation. Dan-Cohen
explores the fact that criminal law can consist of conduct rules and decision rules
that are different: for example, “let no man steal” is a conduct rule, whereas “let the
judge cause whoever is convicted of stealing to be hanged” is a decision rule. DanCohen resists the idea that one can be reduced to the other. He notes that according
to Austin, judges merely “apply” conduct rules, and that Kelsen tried to collapse
conduct rules into decision rules, on the assumption that primary actors respond to
the prospect of legal decision-makers following the decision rule. But in principle
conduct rules and decision rules need not be the same; they can be independent.
Below we build into our model a special kind of acoustic separation. We assume
that some actors are aware of both the conduct rule and the decision rule, whereas
others are aware of only the conduct rule. In the extreme, evasion is a problem where
bad-faith actors are aware not only of the conduct rule but also of the consequences
of behavior as far as the decision rule is concerned, and they are focused on both.
They are ready to game the system as a whole, and they have the requisite knowledge
for such gaming.
What about the good-faith people at their best, who are not aware of the decision
rule or at least are not focused on it? These garden-variety people can receive a good
deal of leniency without upsetting the system, because they are not evaders. In Dan
Kahan’s terms (1997), the law can afford not to achieve exact compliance from this
group of people. The legal system should afford a safe harbor for these actors, who
generally sense that by following their moral inclinations they are not likely to run
afoul of the law.
Unlike classic acoustic separation, however, we add a new twist that makes the
legal system better able to juggle the two audiences: the same literal message can
serve as an antievasion device for bad-faith actors while not interfering with (or
even while promoting) the intrinsic motivation of the good-faith actors. As we have
seen, equity is couched in moral terms (clean hands, not profiting from one’s own
wrong, equity as a court of conscience). To the evaders, the system sends a message
that it is reserving the second move in order to counteract evasionary behavior,
even if it appears in a new guise. The same moral norms will have an appeal to the
good-faith people, not as a legal message, but as reinforcement of existing moral
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norms. Thus, equity avoids crowding out intrinsic motivation, and in some cases
can even promote moral deliberation (Shiffrin, 2010).
To further specify the nature of the different audiences, we draw an analogy to
the notion of regulatory focus. In Higgins’s theory (1996), regulatory focus refers
to the orientation of primary actors either to the promotion of a desirable state or
to the prevention of an undesirable one. The promotion focus corresponds to an
active and engaged stance and a tendency toward taking greater risk; the prevention
focus is associated with an orientation to preservation, greater caution, and risk
avoidance. While we think that there are many differences between the regulatoryfocus paradigm and the dichotomy between good faith and bad faith we wish to
advocate, the work of Gino and Margolis suggests that the analogy between the two
dichotomies might be illuminating.
In four experiments, Francesca Gino and Joshua Margolis (2011) have found that
they could induce regulatory focus in such a way that subjects who were primed for
a promotion focus were more likely to cross an ethical line than were subjects primed
for a prevention focus. The promotion focus encourages risk-seeking behaviors,
including ethical stretches. In another study, Francesca Gino and Dan Ariely (2012)
found that more creative people were more likely to engage in dishonest acts,
because they were better able to engage in divergent thinking to devise new tricks
and were more cognitively flexible about integrating the unethical behavior into
their positive moral self-image (the authors tested for the latter). In an analogy to
the dichotomy developed around Higgins’s theory, in our model bad-faith people
can be seen as having a prevention focus when in compliance mode and having
a promotion focus as evaders. Evasion is a matter of opportunistic creativity. What
about good-faith people receiving the “same” equitable message? We can say that
they are in promotion mode, but their focus is not on the law but on the moral norm
itself.16
We therefore consider how the same literal message can have a differential effect
on good-faith and bad-faith people (or people in good-faith and bad-faith mode). The
law is ambiguous and morally inflected exactly where there is a crucial overlap in the
literal message in our model. If designed properly, such messages reinforce intrinsic
motivation in good-faith people, thereby promoting high performance. At the same
time, the ambiguous morally infused message serves as a warning to opportunists
that they can be sanctioned if they evade the letter of specific provisions of the
law (if they engage in bad-faith evasion of the directives of the law). We call this
dual-function set of nonspecific morally inflected commands behavioral equity.
Our model rests on an assumption that good-faith and bad-faith people have
different information about the law and a different orientation toward it. Badfaith people have information about the law, both as conduct rules and as decision
rules. (This includes otherwise good-faith people who are induced by some factor to
16
This is a departure from Higgins’s theory (1996), in which promotion relates to
the law only. To the extent that morality works as a norm system, we hypothesize that
an analogous mechanism can work with respect to morality, and we have built this hypothesis into our model.
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Figure
Acoustic-Separation Model of Behavioral Equity
engage not only in motivated reasoning but in outright conscious evasion.) Bad-faith
people respond to the content of specific directives, thus promoting compliance.
When they have too much information about loopholes ex ante, they also have
sophisticated knowledge about the role of equity as an ex post device to counter
their evasive moves. Thus behavioral equity is vague ex ante, but specific ex post
(as a second mover).17 By contrast, the good-faith people regard the law from a less
detailed perspective and want to know merely that the law accords with their sense
of what is right. They do not need or want to know much detail, and in some
circumstances can be expected to fill it in with their own sense of morality. For these
actors it is important for the law not to intrude with too much specificity, especially
specific information that may seem to conflict with basic extralegal morality.
We take from the acoustic-separation model the notion that a legal directive can
do double duty: the same literal message can be received in different and even
contradictory ways by different audiences, without one communication interfering
with the other. The hypothesis is that both specific and (especially) ambiguous
directives exhibit acoustic separation in the sense that good-faith and bad-faith
people are intended to interpret a given directive differently with regard to its
generality.
Thus, specific commands are directed to those with a prevention focus, who do not
want to be on the wrong side of the law. Here, with the actors depicted in the middle
of the figure, the emphasis is on compliance rather than performance. The audience
is not especially good-faith or bad-faith and approximates the picture of actors in
the rational-actor models. On the left in the figure, vague moral directives elicit high
performance from actors who have a promotion focus on morality. The vague moral
directives do not crowd out, and if anything dovetail with and reinforce, the actor’s
moral sense. These actors can be thought of as especially good-faith or motivated
17 Although the ex ante perspective is often associated with law and economics, the
role of equity as intervening ex post can be captured in the rational-actor model (Ayotte, Friedman, and Smith, 2013). The opportunists are crucially aware ex ante about
what might happen ex post if they engage in opportunism. The garden-variety good
people have a simpler ex ante perspective that the law accords with their moral outlook, and for our present purposes one might identify their ex ante perspective with intrinsic motivation along with the promotion focus on morality.
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in a positive, moral way. On the right-hand side of the figure are the evaders. They
are those with a promotion focus on the law, willing to use their knowledge of law
as a set of conduct and decision rules to further their narrow interests. These are
the bad-faith actors, who are creative but in a socially destructive fashion. Vague
moral directives – the “same” ones that are aimed at the good-faith people – will
be interpreted by the evaders (with their promotion focus on the law) as decision
rules that reserve second-mover status as legal decision-makers who will use moral
standards to thwart and counter the evaders. The left and right ends of this spectrum
are the joint target of behavior equity with its special kind of acoustic separation.
Our model also suggests reasons why it has been difficult to observe behavioral
equity at work in the law, even if implicitly. The assumption of uniform legal actors,
or at least simply rational ones, has tended to obscure how legal directives can
reach people with different motivations differently. In our model, law and equity
do double duty in different ways. Equity sends a nonspecific moral message to two
different groups, the good-faith and the bad-faith, with different effects, enhancing
performance and discouraging evasion, respectively. The law (in the narrow sense,
as distinguished from equity) uses specific commands that are not necessarily moral
(positivistically, one may say) but have a similar effect on similar people. That is,
when good-faith people are engaged in motivated reasoning, it sometimes makes
sense to lump them in with the bad-faith. The law as a set of specific commands
seems to be paradigmatic because it is directed at “everyone” some of the time.
This seeming comprehensiveness may make it appear that specific law is all there
is to real law, and that the law is really directed at the Holmesian “bad man”
(1897, p. 459). The good-faith people and the evaders then end up being peripheral
embarrassments. Behavioral equity can bring these actors back into the picture, in
one fell swoop.
Consider an illustrative example of behavioral equity, from the field of trespass
and building encroachments. The basic message in this case is “keep off,” and the
law tracks basic morality (Merrill and Smith, 2007). It also shades off into a more
cooperative morality when it comes to nuisances and problems like overhanging
trees (the law of neighbors). The traditional rule has been that equity does not enjoin
a mere trespass.18 This is somewhat startling at first, because trespass has often
been regarded as the basic rule delineating legal things and giving them their most
stringent protection. It is not even required to show harm for there to be a trespass,
and punitive damages and restitution (disgorgement) have been used as remedies for
trespass. On closer look, however, trespass saves its real firepower for the bad-faith
actor while sending a seemingly strict and morally inflected message to goodfaith people. Someone who engages in a repeated or continuous trespass is subject
to a fairly automatic injunction, and bad-faith trespass can be subject to serious
sanction (Gergen, Golden, and Smith, 2012, pp. 235ff.). In Jacque v. Steenberg
18 See Justices of Pike County v. Griffin & W. Point Plank Rd. Co., 11 Ga. 246,
250 (1852) (“It is well understood that Equity will not interfere in a case of a mere
trespass”).
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Homes,19 $100,000 in punitive damages was imposed on the trespasser precisely
because it was gaming the system: the company’s foreman knew that delivering
a mobile home across the snow field of the elderly farming couple would not cause
much measurable damage, and he found overriding their objections to be amusing.
Ordinary good-faith people can go about their business not committing trespasses
or committing de minimis ones without worrying about liability (although technically there is liability in the latter case). The law sends a reassuring message that
property rights are important, but normal good-faith behavior will not be penalized.
At the same time, those who know too much about the rules and who might be
tempted to take opportunistic advantage of leniency for minor trespasses will find
that the strict message of the law will indeed be upheld strictly in their case. Evasionary actors and those engaging in self-serving motivated reasoning receive the
same literal message as the moral or good-faith actors, but take away a different
meaning. There is acoustic separation supporting behavioral equity.
Equity also touches upon excuses, and that resonates with the notion of leniency
in criminal law. As in Kahan’s account of mistakes and lenity in criminal law, equity
offers its excuses differentially. To continue with the law of trespass, the general
rule in building encroachments is that they are continuing trespasses and therefore
subject to injunction. Nevertheless, a small encroachment done in good faith (by
mistake) is often partially excused in the sense that the remedy is damages rather than
an injunction (Gergen, Golden, and Smith, 2012, pp. 235ff.; Smith, 2010; Laycock,
2011).20 This solution is often placed under the heading of undue or disproportionate
hardship (Laycock, 2011), so that if the injunction inflicted far greater harm on the
enjoined party (the violator) than it would benefit the moving party (whose rights
were violated), a court can exercise its discretion, and it regularly does so, to lessen
the remedy to damages. But if the encroachment was carried out in bad faith,
the full injunctive remedy applies, regardless of the amount of hardship. This is
acoustic separation in behavioral equity. Society wants the good-faith people to try
their best within reason, without being paranoid about the boundary in the form of
overcompliance (see Sterk, 2008, and Denicolò et al., 2008). There is a low cost of
ex post monitoring in this case (locating the boundary), and the general assumption
is that most people are good-faith (nonopportunistic) and in a promotion mode,
focused on morality. The doctrine announces a set of directives that accords with
everyday morality and sends the general message that reasonable behavior never
leads to dire consequences. For those in prevention mode and focused on the law,
the message is equally clear: obtain a good survey. But as soon as there is reason
to suspect someone of evasion, the law is unyielding. Thus, the same message is
delivered to people along the entire spectrum between good faith and bad faith with
differential behavioral effect.
19
20
563 N.W.2d 154 (Wis. 1997).
See Golden Press, Inc. v. Rylands, 235 P.2d 592 (Colo. 1951); Raab v. Casper,
124 Cal. Rptr. 590 (Cal. Ct. App. 1975) (California Good Faith Improver Act); Dickinson (1985, pp. 42–49).
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We would like to note that even the mere distinction between good-faith and badfaith people can vary according to which legal doctrine is at issue. In some cases,
people’s motivation aligns with the law, making them good-faith actors, whereas at
other times their motivation may not be aligned with the law, making them more
likely to behave as bad-faith people. When intrinsic motivation is aligned with the
purposes of the law and specific rules could crowd out motivation, the purpose of
equity is to prevent this from happening. When intrinsic motivation is not aligned
with the purposes of the law, even good-faith people may want to evade the law, and
the combination of self-serving mechanisms and ambiguity could make it easier for
them to do so. Hence, preventing an unintentional self-serving interpretation of the
law is especially needed when motivation is not aligned with the law. The terms
“bad faith” and “good faith” designate the extremities of a spectrum of motivation
on which particular actors may find themselves at different points under different
circumstances.
6 Limitations and Conclusion
In the present paper we have attempted to revisit some of the rational-choice models
of the interaction between law and equity, understood primarily as contrasting and
complementary regulatory and decision-making modes. We suggested that adding
insights from behavioral economics and behavioral ethics will allow us to offer
a richer and more accurate model of the optimal specificity of law and of the
employment of moral language and sanctioning. The works reviewed in this paper
have enabled us to make specific predictions about the behavior of people, taking
account of differences between them, their motivations regarding the law, and the
likely effect of various forms of law on their behavior.
In behavioral equity, the law uses vague moral directives to reach two groups
simultaneously: the good-faith people with a promotion focus on morality, and the
bad-faith people (opportunists, evaders) with a promotion focus on the law. Behavioral equity can simultaneously promote performance and avoid crowding out
intrinsic motivation for the former, while holding a sword of ex post intervention
over the latter. The evaders, with their promotion focus on the law, have knowledge
of how equity will be used ex post as a rule of decision as well as of conduct,
whereas actors with an ethical focus will regard the law as consisting of conduct
rules that dovetail with their moral expectations. Specific rules are used for actors, whether we regard them as good-faith or bad-faith, who have a prevention
focus on the law. Specific rules here aim for compliance, in areas where motivation for performance is not as important (for example, where behavior is easily
measured).
We naturally had to make some compromises to produce a usable model. For
example, for purposes of simplicity we separated people into good-faith and badfaith. There is much to be said about the feasibility of this dichotomy from various
angles. The possibility of opening the rational-choice assumption to a richer ty-
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pology of people extends also to other aspects of the law’s influence that are not
entirely clear, such as the stability of preferences and motivations to comply, the
likelihood that intrinsic motivation is aligned with the law without external intervention, and the ability to correlate aspects such as morality, risk perception, and
reputation concerns of people designated as good-faith and bad-faith. Further theoretical and experimental work is needed to better capture the dichotomy advocated
here. This would improve the ability of the law to base the optimal specificity of
law and equity on a richer classification than the dichotomy between good faith and
bad faith presented in this paper. Using such an approach, the use of equity could
be tailored more accurately to the need to reduce evasion by some people and to
increase performance and commitment by others.
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Yuval Feldman
Bar-Ilan University
52900 Ramat Gan
Israel
Yuval.Feldman@biu.ac.il
Henry E. Smith
Harvard Law School
1575 Massachusetts Avenue
Cambridge, MA 02138
U.S.A.
hesmith@law.harvard.edu
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