In this paper, we take a first step toward exploring empirically the product assortment strategies of oligopolistic firms. Our starting point is a discrete-choice demand model for differentiated products. We incorporate the demand model into an equilibrium supply model, in which firms compete by...

The goal of this paper is to provide an investigation of several approaches to valuing ecosystem services and to contribute additional techniques which may be used in evaluating `green' GDP accounts. Our estimates focus on the ecosystem as a productive economic input, not a stock which is...

What is the optimal allocation of prizes in an innovation race? Should the winner take all, or is it preferable that the original inventor shares the market with subsequent independent duplicators? Some recent papers in law and economics have argued that the latter, more permissive solution is...

Price discrimination by imperfectly competitive firms may intensify competition, leading to lower prices for all consumers; the trade-off of consumer groups' welfare that is characteristic of monopolistic discrimination need not arise. This escalation of competition may make firms worse off, and...

Studies of gender differences in the returns to job mobility have yielded conflicting results. We examine whether there are gender differences in mobility patterns or in the returns to different types of mobility. Our results, based on the National Longitudinal Survey of Youth, imply that there...

This paper investigates the use of reputation in an economy where principals hire agents for two different kinds of tasks, in which the agents have differing aptitudes. Principal-agent matches are remade every period, but a principal can acquire some information on the past behavior of her...

We introduce a model of proportional growth to explain the distribution Pg(g) of business-firm growth rates. The model predicts that Pg(g) is exponential in the central part and depicts an asymptotic power-law behavior in the tails with an exponent z=3. Because of data limitations, previous...