Extending the approach to congressional and regulatory institutions developed by Shepsle and Weingast, this article introduces an ideologically motivated judiciary. The model yields empirically refutable implications which are then tested in the framework of modelling the Court's decisions on...

This article provides the first evidence linking airfares to the structure of airline hub-and-spoke networks. The hypothesis tested is that any force that increases traffic volume on the spokes of a network will reduce fares in the markets it serves. This effect arises because of economies of...

This article develops a methodology to test alternative oligopoly models and to analyze the effects of entry restrictions on conduct. This methodology is applied to the Uruguayan banking sector, whose legal entry barriers were significantly relaxed during the late 1970s. The results are...

To examine the potential gains from a second production source, we examine how source switching is optimally structured. The model focuses on a purchaser who manages the acquisition process, an incumbent supplier, and a potential entrant or second supplier. Because the costs of the incumbent and...

This research examines the location choice of California private schools in 1978-1979. We make use of some of the recent developments in the analysis of count data. The results indicate that the character of the population and the public schools influence location decisions. Private schools with...

We investigate product life cycles in the commercial mainframe computer market. We use hazard models with time-varying covariates to estimate the probability of product exit and Poisson models to estimate the probability of introduction. We measure the importance of different aspects of market...

This research examines the relative strength and significance of the status of "incumbent contractor" in federal computer procurement. One finding, as expected, is that an agency is likely to acquire a system from an incumbent vendor. Another finding, perhaps more interesting, is that the...