The recent literature on individual vs. group decisions over risk has brought about divergent results, mainly depending on the institutional rules through which groups take decisions. While some studies where group decisions relied on the majority rule showed no appreciable difference between...

This paper reports the results of a meta-study of 89 prisoner's dilemma experiments comprising more than 3000 participants across 6 countries. We organize existing evidence and explain seemingly contradictory results in the existing literature by focusing on two dimensions of the dilemma:...

Both economists and psychologists are interested in understanding decision making under uncertainty. Yet, they rely on different concepts to analyse human behaviour: Economists use economic preference parameters rooted in utility theory, while psychologists use personality traits to describe...