It is well known that risk increases the value of options. This article makes that precise in a new way. The conventional theorem says that the value of an option does not fall if the underlying asset becomes riskier in the conventional sense of the mean-preserving spread. This article uses two...

A convicted criminal suffers not only from public penalties but from stigma, the reluctance of others to interact with him economically and socially. Conviction can convey useful information about the convicted, which makes stigmatization an important and legitimate function of the criminal...

Imposing liability on a company for sexual harassment by supervisors cannot be justified as promoting equality between the sexes, protection of workers, or protection of the owners of the company. Such liability might be justified to prevent breach of contract or behavior offensive to the...

There is a secret paradox at the heart of social contract theories. Such theories assume that, because personal security and private property are at risk in a state of nature, subjects will agree to grant Leviathan a monopoly of violence. But what is to prevent Leviathan from turning on his...

The tax office wins most cases in Japan. We think about why this might be. We find that although judges who rule in favor of the taxpayer do not suffer in their future careers, if the loser-- whether governemnt or taxpayer--appeals and wins, the reversed judge's career does take a turn for the...

Conviction rates in Japan exceed 99 percent -- why? On the one hand, because Japanese prosecutors are badly understaffed they may prosecute only their strongest cases and present judges only with the most obviously guilty defendants. On the other, because Japanese judges can be reassigned by the...

Two central puzzles about social norms are how they are enforced and how they are created or modified. The sanctions for violation of a norm can be categorized as automatic, guilt, shame, informational, bilateral- costly, and multilateral-costly. Problems in creating and enforcing norms are...

We consider the learning curve in an industry with free entry and exit, and price-taking firms. A unique equilibrium exists if the fixed cost is positive. While equilibrium profits are zero, mature firms earn rents on their learning, and, if costs are convex, no firm can profitably enter after...

We look at a Bertrand model in which each firm may be inactive with a known probability, so the number of active firms is uncertain. The model has a mixed-strategy equilibrium, in which industry profits are positive and decline with the number of firms, the same features which make the Cournot...

The possibility of buying out an entrant has an import ant effect on entry deterrence. Entrants can blackmail the incumbent by threatening to keep prices low, and buyout can make entry profitab le which otherwise would not be. In particular, the entry-deterrence policy of excess capacity to...