Transplants of donated stem cells save the lives of many patients with blood diseases. Donation is somewhat painful, but rarely has lasting adverse effects. Patients can accept transplants only from donors with compatible immune systems. Those lacking a sibling match must seek donations from the...

We study three different models in which public goods are supplied by private contributions. In one of these models, tax-financed government subsidies to private contributions will definitely increase the equilibrium supply of public goods. In the other two models, government subsidies are...

In many applications, assumptions about the log-concavity of a probability distribution allow just enough special structure to yield a workable theory. This paper catalogs a series of theorems relating log-concavity and/or log-convexity of probability density functions, distribution functions,...

This paper provides an empirical investigation of a theoretical model of the marriage market. In the model, women are valued more for their ability to bear children and men are valued more for their ability to make money. Men cannot reveal their labor market ability to potential spouses until...

This paper presents an evolutionary game theoretic analysis of the dynamics of a population of prisoners' dilemma players where the probability of encountering an cooperator is higher for cooperators than for noncooperators. Examples from biological and cultural evolution are presented. There is...

This paper explores the evolutionary biology of cooperation between relatives playing asymmetric games.

This paper studies the evolutionary game theory of parent-offspring conflict. It revisits a question posed by Gary Becker in economics and Richard Alexander in biology, namely "when do children act in accord with the reproductive interests of their parents?"

This paper seeks useful conditions relating individual preferences to willingness to support specific governmental tax-expenditure proposals. This discussion follows Wicksell in considering only tax-expenditure proposals that specifically tie expenditures to taxes that finance them.