concern for other people's welfare (altruism) in the process of making high profits. Even with few truly altruistic firms, an …

To understand the "pure" incentives of altruism, economic laboratory research on humans almost always forbids … communication between subjects. In reality, however, altruism usually requires interaction between givers and receivers, which … altruism are built on human sociality. We experimentally examine communication in which one subject allocates $10 between …

vigilante justice, as represented by peer-to-peer punishment, to delegated policing, as represented by the "hired gun" mechanism …

their children will someday apply to the university and that reciprocity in the form of a higher probability of admission is … teenagers do not. The evidence is strongly consistent with the child-cycle pattern. Thus, while altruism drives some giving, the …

We introduce the possibility of direct punishment by specialized enforcers into a model of community enforcement … specialized enforcement technology is sufficiently effective, cooperation is best sustained by a “single enforcer punishment … punishment that enforcers are willing to impose on deviators. Conversely, when the specialized enforcement technology is …