Recent decades have seen a rise in the use of physics methods to study different societal
phenomena. This development has been due to physicists venturing outside of their …

I survey the literature post Ledyard (Handbook of Experimental Economics, ed. by J. Kagel,
A. Roth, Chap. 2, Princeton, Princeton University Press, 1995) on three related issues in …

As people spend increasing proportions of their daily lives using social media, such as
Twitter and Facebook, they are being invited to support myriad political causes by sharing …

Although firms are expending substantial resources to develop technology and processes
that can help safeguard the security of their computing assets, increased attention is being …

This paper shows that reciprocity has powerful implications for many economic domains. It is
an important determinant in the enforcement of contracts and social norms and enhances …

Are people conditionally cooperative? Evidence from a public goods experiment - ScienceDirect
Skip to main contentSkip to article Elsevier logo Journals & Books Search RegisterSign in View …

People are reciprocal if they reward kind actions and punish unkind ones. In this paper we
present a formal theory of reciprocity. It takes into account that people evaluate the kindness …

We document the widespread existence of antisocial punishment, that is, the sanctioning of
people who behave prosocially. Our evidence comes from public goods experiments that we …

The existence of social norms is one of the big unsolved problems in social cognitive
science. Although no other concept is invoked more frequently in the social sciences, we still …

One lingering puzzle is why voluntary contributions to public goods decline over time in
experimental and real-world settings. We show that the decline of cooperation is driven by …