The authors examine the role of differentiation strategies for entry behavior in markets for local telecommunication services in the late 1990s. Whereas the prior literature has used models of interaction among homogenous firms, this research is motivated by the claim of entrants that they...

We assess the competitive impact that single-market banks and thrift institutions have on multi-market banks (and vice-versa) in 1,884 non- MSA markets. We estimate a model of equilibrium market structure which endogenizes entry for three types: multi-market banks, single-market banks, and...

We examine the role of differentiation among competitive local exchange carriers (CLECs) in nearly 1,200 U.S. cities in 1999 and 2002, before and after a valuation crash affecting communications firms. We test and reject the null hypothesis of homogeneous competitors. We also find strong...

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...

The standard approach to identifying second degree price discrimination is based on examining correlations between product menus and prices. When product menus are endogenous, however, tests for price discrimination may be biased by the fact that unobservables affecting costs or demand may...

This paper introduces a simple method to test between two general approaches to defining bank and thrift product markets. I estimate two models that endogenize market structure using data on banks and thrifts from 1,884 rural markets for the year 2000. The first model assumes that banks and...

We examine the choice between internal or external provision of information technology (“ITâ€) services for US credit unions. Credit unions may provide their own systems for tracking loans and deposit accounts or they may choose to outsource these systems from external providers....