altruism by leaving financial bequests, but also by voting and contributing to the environmental quality their children will …

in unequal groups does not accord with models of inequality aversion or egocentric altruism which require an equal …

unrelated to altruism. First, individual use of punishment was uncorrelated with contribution to the public good, contrary to …

cooperation may be less than additive. Using a utility function embodying both reciprocity and altruism we show that unconditional … altruism attenuates the punishment motive and thus may reduce the level of punishment inflicted on defectors, resulting in … lower levels of contribution. Increases in altruism may also reduce the level of benefits from the public project net of …

underlie such behavior, including altruism, strategic motives, and direct or indirect positive reciprocity. It is not yet well … over time. We use a laboratory experiment to study the elements and dynamics of favor trading in a particular setting: the … private provision of a public good. In our experiment, giving subjects the ability to practice targeted reciprocity by making …