I consider a repeated trust game played between a group of insiders, arranged in a network representing their lines of communication, and a single outsider. Insiders follow a local punishment rule, shunning the outsider if it has cheated them or a neighbor. The object of interest is that the...

I consider a repeated trust game played between a group of insiders, arranged in a network representing their lines of communication, and a single outsider. Insiders follow a local punishment rule, shunning the outsider if it has cheated them or a neighbor. The object of interest is that the...

We consider a spillover externality in the use of information. When a person consumes an information source, she enjoys private benefit but also creates social value. Her use of the source enhances society's understanding of it, which is `in the air' and freely accessible by others, but which...

Upstream players produce design ideas and downstream players select among these ideas to develop finished products. Design diversity is valuable at the upstream stage and coordination is valuable at the downstream stage, in the sense that this maximizes the sum of payoffs to all players....