data: the increase and later erosion of cooperation when commoners vote against the imposition of a fine, and the high … deterrence power of low fines. When fines are rejected, internalization of a social norm explains the increased cooperation …; violations (accidental or not), coupled with reciprocal preferences, account for the erosion. Low fines stabilize cooperation by …

willingness to do so as well. Finally, we find that the local connectivity structure of the network has an important role as …

Cooperation and competition are both essential elements of economic life. Here we explore how cooperativeness in a …

This paper compares cooperation among Columbian and Swedish children aged 9-12. We illustrate the dynamics of the …

arguments supporting this evidence are not clear. This article presents a specific mechanism: cooperation and competition among …