Two central puzzles about social norms are how they are enforced and how they are created or modified. The sanctions …-costly. Problems in creating and enforcing norms are related to which sanctions are employed. We use our analysis of enforcement and …

— unrelated individuals cooperate only if they face economic rewards or sanctions rendering cooperation a self-interested choice … serious shortcomings because it overlooks negative effects of sanctions on human altruism. Sanctions revealing selfish or … greedy intentions destroy altruistic cooperation almost completely, whereas sanctions perceived as fair leave altruism intact …

People can become less cooperative when threatened with sanctions, and researchers have pointed to both 'intentions … investment and, in some treatments, are given the option to threaten sanctions to enforce this return request. The decisions of … amount that is less than the investor requested. When threatened with sanctions this decision becomes least common. In …

been an important factor in this decline. Our claim is based on a structural search-matching model, the times series of job …

through search of the neighborhoods of these randomly met nodes. We show that this model exhibits the full spectrum of …. Besides offering a close fit of these diverse networks, the model allows us to impute the relative importance of search versus … random attachment in link formation. We find that the fitted ratio of random meetings to search-based meetings varies …

We study search behavior in a generalized "secretary problem" environment in which consumers search sequentially for … make no distributional assumptions about the quality of the alternatives. Rather, at each stage of the search the consumers …. Our study departs from previous experimental investigations of the secretary problem by including search costs and …

We study an equilibrium sequential search model where buyers have potentially downward-sloping demand and with … bilateral heterogeneity in buyers' search costs and firms' production costs. We show that downward- sloping demand and … distribution of search costs is 'uniform-like'. It follows that the set of equilibrium price distributions is nonempty and has a …