We investigate whether there is a link between conditional cooperation and betrayal aversion. We use a public goods game to classify subjects by type of contribution preference and by belief about the contributions of others; and we measure betrayal aversion for different categories of subject....

We use an experiment to test the hypothesis that groups consisting of like-minded cooperators are able to cooperate irrespective of punishment and therefore have a lower demand for a costly punishment institution than groups of like-minded free riders, who are unable to cooperate without...

Extensive experimental research on public goods games documents that many subjects are “conditional cooperators” in that they positively correlate their contributions with (their belief about) contributions of other subjects in their group. The goal of our study is to shed light on what...

In this paper, we study how between-group wealth and size heterogeneity affect success probabilities as well as aggregate rent-seeking efforts when two groups compete for the allocation of a pure public good. Unlike with previous models, we measure the utility cost of rent-seeking in terms of...

We study cooperation within and between groups in the laboratory, comparing treatments in which two groups have previously been (i) in conflict with one another, (ii) in conflict with a different group, or (iii) not previously exposed to conflict. We model conflict using an inter-group Tullock...

We study cooperation within and between groups in the laboratory, comparing treatments in which two groups have previously been (i) in conflict with one another, (ii) in conflict with a different group, or (iii) not previously exposed to conflict. We model conflict using an inter-group Tullock...

Risk and uncertainty are an integral part of everyday human interactions. Recent literature has shown that group size uncertainty might change strategic cooperation behavior in significant ways. In this paper, we investigate how conditional cooperation changes under group size uncertainty in a...

Explaining the evolution and maintenance of cooperation among unrelated individuals is one of the fundamental problems in biology and the social sciences. Recent experimental evidence suggests that altruistic punishment is an important mechanism to maintain cooperation among humans. In this...

This paper introduces new experimental designs to enrich understanding of conditional cooperation and punishment in public good games. The key to these methods is to elicit complete contribution or punishment profiles using the strategy method. It is found that the selfish bias in conditional...