Infectious diseases are transmitted from person to person or from vectors such as mosquitoes to people. The uninfected take precautions against these diseases and the infected try to mitigate their symptoms and to get cured. In doing so, people may weigh the costs of illness, prevention and...

Repudiation and expropriation pose obstacles to the international mobility of capital and thereby to efficient international allocation of resources. Tomz discusses the determinants of lending in the face of the threat of repudiation. Using history, he argues that debtor countries have sought a...

Tax laws and administrations often treat different size firms differently. There is, however, little research on the consequences. As modeled here, oligopolists with different efficiencies determine the size distribution of firms. A government that maximizes a weighted sum of consumer surplus,...

Economics plus epidemiology provide models of infections and associated behavior of private individuals. They show how infections generate problems of dynamic externalities, scope for government to offset externalities, and problems of the second best when government cannot or does not. Features...