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Keywords:Human behavior 

Working Paper
Games with synergistic preferences

In economic situations a player often has preferences regarding not only his or her own outcome but also regarding what happens to fellow players, concerns that are entirely apart from any strategic considerations. While this can be modeled directly by simply writing down a player's final preferences, these are commonly unknown a priori. In many cases it is therefore both helpful and instructive to explicitly model these interactions. This paper, building on a model due to Bergstrom (1989, 1999), presents a simple structure in the context of game theory that incorporates the "synergies" ...
Working Papers , Paper 11-15

Working Paper
Moral hazard, peer monitoring, and microcredit: field experimental evidence from Paraguay

Given the substantial amount of resources currently invested in microcredit programs, it is more important than ever to accurately assess the extent to which peer monitoring by borrowers faced with group liability contracts actually reduces moral hazard. We conduct a field experiment with women about to enter a group loan program in Paraguay and then gather administrative data on the members' repayment behavior in the six-month period following the experiment. In addition to the experiment which is designed to measure individual propensities to monitor under incentives similar to group ...
Working Papers , Paper 10-6

Report
Bayesian social learning, conformity, and stubbornness: evidence from the AP top 25

The recent nonexperimental literature on social learning focuses on showing that observational learning exists, that is, individuals do indeed draw inferences by observing the actions of others. We take this literature a step further by analyzing whether individuals are Bayesian social learners. We use data from the Associated Press (AP) U.S. College Football Poll, a weekly subjective ranking of the top twenty-five teams. The voters' aggregate rankings are available each week prior to when voters have to update their individual rankings, so voters can potentially learn from their peers. We ...
Staff Reports , Paper 453

Working Paper
Do people behave in experiments as in the field?: evidence from donations

Laboratory experiments are an important methodology in economics, especially in the field of behavioral economics. However, it is still debated to what extent results from laboratory experiments can be applied to field settings. One highly important question with respect to the external validity of experiments is whether individuals act the same in experiments as they would in the field. ; This paper presents evidence on how individuals behave in donation experiments and how the same individuals behave in a naturally occurring decision situation on charitable giving. The results show that ...
Working Papers , Paper 06-8

Working Paper
Another hidden cost of incentives: the detrimental effect on norm enforcement

Monetary incentives are often considered as a way to foster contributions to public goods in society and firms. This paper investigates experimentally the effect of monetary incentives in the presence of a norm enforcement mechanism. Norm enforcement through peer punishment has been shown to be effective in raising contributions by itself. We test whether and how monetary incentives interact with punishment and how this in turn affects contributions. Our main findings are that free riders are punished less harshly in the treatment with incentives, and as a consequence, average contributions ...
Working Papers , Paper 09-2

Working Paper
Active decisions and pro-social behavior

In this paper, we propose a decision framework where people are individually asked to either actively consent to or dissent from some pro-social behavior. We hypothesize that confronting individuals with the choice of whether to engage in a specific pro-social behavior contributes to the formation of issue-specific altruistic preferences, while simultaneously involving a commitment. The hypothesis is tested in a large-scale field experiment on blood donations. We find that this ?active-decision? intervention substantially increases the actual donation behavior of people who had not fully ...
Working Papers , Paper 07-13

Working Paper
Predicting health behaviors with economic preferences and perceived control

We present new evidence on the relationship between health behaviors and experimental measures of risk and time preferences and introduce evidence that perceived control ? a measure incorporated from the health psychology literature ? is a stronger and more consistent predictor of health behaviors than economic preferences.
Working Papers , Paper 12-16

Working Paper
Social and private learning with endogenous decision timing

Firms often face choices about when to upgrade and what to upgrade to. We discuss this in the context of upgrading to a new technology (for example, a new computer system), but it applies equally to the upgrading of processes (for example, a new organizational structure) or to individual choices (for example, buying a new car). This paper uses an experimental approach to determine how people address such problems, with a particular focus on the impact of information flows. Specifically, subjects face a multi-round decision, choosing when (if ever) to upgrade from the status quo to either a ...
Working Papers , Paper 09-11

Working Paper
Managing self-confidence: theory and experimental evidence

Evidence from social psychology suggests that agents process information about their own ability in a biased manner. This evidence has motivated exciting research in behavioral economics, but also garnered critics who point out that it is potentially consistent with standard Bayesian updating. We implement a direct experimental test. We study a large sample of 656 undergraduate students, tracking the evolution of their beliefs about their own relative performance on an IQ test as they receive noisy feedback from a known data-generating process. Our design lets us repeatedly measure the ...
Working Papers , Paper 11-14

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