Evidence has been obtained which indicates that the possession of glycogen by Streptococcus mitis favors its survival during starvation.

We compare the effects of taxes and quotas for an environmental problem where the regulator and polluter have asymmetric information about abatement costs, and environmental damage depends on pollution stock. An increase in the slope of the marginal abatement cost curve, or a decrease in the slope of the marginal damage curve, favors taxes. An increase in the discount rate or the stock decay ra...

A model is proposed for the evolution of X-chromosome inactivation (XCI) in which natural selection initially favors the silencing of paternally derived alleles of X-linked demand inhibitors. The compensatory upregulation of maternally derived alleles establishes a requirement for monoallelic expression in females. For this reason, XCI is self-reinforcing once established. However, inactivation...

The allocation of a government budget between a public good and transfers is modeled under different systems of government. The relatively even distribution of political power among groups in a democracy favors spending on nonexclusive public goods. The more concentrated pattern of political power in a dictatorship favors spending on transfers targeted to powerful groups. The hypothesis on publ...