Marc Willinger

A comparison of trust and reciprocity between France and Germany: Experimental investigation based on the investment game

Abstract We compare the results of a one-shot investment game, studied earlier by Berg et al. [Games and Economic Behavior 10 (1995) 122], for France and Germany. In this game, player A is the trustor and player B the trustee. The average level of investment is significantly larger in Germany, but the level of reciprocity is not significantly different between the two countries. This implies that German B-players earned significantly more than French B-players. Furthermore, in both countries B-players earned significantly more than A-players. Our results support Fukuyama’s conjecture that the level of trust is higher in Germany than in France, a situation which can explain a higher rate of investment and a higher level of performance. However, our results also show that the increased revenue which is attributable to the higher level of trust, is not shared in a more equitable way, but essentially increases B-players’ payoffs. Finally, based on an intercultural trust experiment, we show that French A subjects did not find German B subjects less trustworthy and German A subjects did not find French B subjects less trustworthy.

Framing and cooperation in public good games: an experiment with an interior solution

We show that experimental subjects tend to contribute more to the public good if they perceive the actions of the others as a source of positive externality rather than a source of negative externality. In our experiment partial contribution to the public good is the unique subgame perfect equilibrium for the repeated game.

Principals' principles when agents' actions are hidden

Abstract We examine the behavior of subjects in a simple principal–agent game with hidden action. While subjects in the role of agents tend to choose the actions which maximize their expected profits, subjects in the role of principals offer contracts which differ from the theoretical predictions. We identify three principles of contract design: (1) the agent’s remuneration for the better outcome is at least as high as the remuneration for the worse outcome. (2) The agent must not risk making a loss. (3) The net profit of the agent should not be higher than the net profit of the principal.

Strength of the Social Dilemma in a Public Goods Experiment: An Exploration of the Error Hypothesis

We present the results of an experiment on voluntary contributions to a public good with a unique dominant strategy equilibrium in the interior of the strategy space. The treatment variable is the equilibrium contribution level. By increasing the equilibrium contribution level, we reduce the “strength” of the social dilemma. Though we observe that the average level of contribution rises with the equilibrium contribution level, the average rate of over-contribution is not affected in a systematic way. Over-contribution is statistically significant only at the lower level of equilibrium contribution but not at the higher levels. We show that the Anderson et al. (1998, Journal of Public Economics. 70, 297–323) logit equilibrium model which combines altruism and decision errors fits quite well our laboratory data.

Are more Informed Agents able to shatter Information Cascades in the Lab

An information cascade occurs when agents ignore their own information completely and simply take the same action as predecessor agents have taken. This rational imitation has been empirically revealed by the Anderson and Holt experiment. We replicate this experiment, with different parameter values, and we test the possibility for more informed agents to shatter potential information cascades. Our results corroborate those observed by Anderson and Holt and the theoretical framework on which the experimental design is based.

Income Redistribution And Public Good Provision: An Experiment

We experimentally investigate the impact of income redistribution on voluntary contributions by groups of four subjects. We compare equalizing and unequalizing redistribution. Our data are consistent with the neutrality theorem: Redistribution does not affect the amount of voluntarily provided public good at the group level. However, at the individual level, subjects tend to underadjust with respect to the Nash prediction. We also observe an insignificant adjustment asymmetry between the poor and the rich: Subjects who become poorer adjust their contribution by a larger absolute amount than subjects who become richer. Finally, poor subjects tend to overcontribute significantly more than rich subjects.

Global Environmental Commons: Analytical and Political Challenges in Building Governance Mechanisms

Environmental challenges, and the potential solutions to address them, have a direct effect on living standards, the organization of economies, major infrastructures, and modes of urbanization. Since the publication of path-breaking contributions on the governance of environmental resources in the early 1990s, many political initiatives have been taken, numerous governance experiments have been conducted, and a large multi-disciplinary field of research has opened up. This interdisciplinary book takes stock of the knowledge that has accumulated to date, and addresses new challenges in the provision of environmental goods. It focuses on three essential dimensions with respect to governance. First, it addresses the issue of designing governance solutions through analyzing systems of rules, and levels of organization, in the governance and management of environmental issues. Second, it draws renewed attention to the negotiation processes among stakeholders playing a crucial role in reaching agreements over issues and solutions, and in choosing and implementing particular policy instruments. Finally, it shows that compliance depends on a combination of formal rules, enforced by recognized authorities, and informal obligations, such as social and individual norms. The evolution of the research frontiers on environmental governance shows that more legitimate and informed processes of collective decision, and more subtle and effective ways of managing compliance, can contribute to more effective policy. However, this book also illustrates that more democratic and effective governance should rely on more direct and pluralistic forms of involvement of citizens and stakeholders in the collective decision making processes.

Are People Risk Vulnerable

We report on a within-subject experiment, with substantial monetary incentives, designed to test whether or not people are risk vulnerable. In the experiment, subjects face the standard portfolio choice problem in which the investor has to allocate part of his wealth between one safe asset and one risky asset. We elicit risk vulnerability by observing each subjects portfolio choice in two different contexts that differ only by the presence or absence of an actuarially neutral background risk. Our main result is that most of the subjects are risk vulnerable: 81% chose a less risky portfolio when exposed to background risk. More precisely, 47% invested a strictly smaller amount in the risky asset, whereas 34% were indifferent. Furthermore, contrasting the predictions provided by competing decision-theoretic models, we conclude that expected utility theory best fits our experimental data. This paper was accepted by Uri Gneezy, behavioral economics.

Fixed Instruments to Cope With Stock Externalities an Experimental Evaluation

We evaluate the effectiveness of non optimal and temporally inconsistent incentive policies for regulating the exploitation of a renewable common-pool resource. The corresponding game is an N-person discrete-time deterministic dynamic game of T periods fixed duration. Three policy instruments with parameters that remain constant for the whole horizon are evaluated: a pigouvian tax (flat tax), an ambient tax (ambient flat tax) and an instrument combining the two previous ones (mixed flat instrument). We test in the lab the predictions of the model solved for 3 distinct behavioural assumptions: (a) sub-game perfection, (b) myopic behaviour, and (c) joint payoff maximization. We find that subjects behave myopically in the unregulated situation, which agrees with previous results in the literature. Conditional on predictions, the mixed flat instrument and the flat tax are the most effective policies in approaching the optimum extraction path. However, in absolute terms the ambient flat tax and the mixed flat instrument curb most significantly the mean extraction path towards the optimum path. Paradoxically, these instruments are the less efficient ones.

Do Static Externalities Offset Dynamic Externalities? An Experimental Study of the Exploitation of Substitutable Common-Pool Resources

Overexploitation of coastal aquifers may lead to seawater intrusion, which irreversibly degrades groundwater. The seawater intrusion process may imply that its consequences would not be perceptible until after decades of accumulated overexploitation. In such a dynamic setting, static externalities may enhance the users’ awareness about the resources common nature, inducing more conservative individual behaviors. Aiming to evaluate this hypothesis, we experimentally test predictions from a dynamic game of substitutable common-pool resource (CPR) exploitation. The players have to decide whether to use a free private good or to extract from one of two costly CPRs. Our findings do not give substantial support to the initial conjecture. Nevertheless, the presence of static externalities does induce some kind of payoff reassurance strategies in the resource choice decisions, but these strategies do not correspond to the optimum benchmark.