Most private giving between living generations takes the form of "tied" transfers, such as help with housing downpayments. We argue that parents provide help with downpayments in order to encourage the production of grandchildren, and that such a subsidization emanates from the "demonstration...

We demonstrate how altruism can flourish in a population of nonaltruists. We assume that each individual plays a one-shot prisoner's dilemma game with his or her sibling and that the probability than an individual survives to reproduce is proportional to his or her payoff in this game. We model...

We weave together care-giving, gender, and migration. We hypothesize that daughters who are mothers have a stronger incentive than sons who are fathers to demonstrate to their children the appropriate way of caring for one's parents. The reason underlying this hypothesis is that women on average...