What determines structure and profitability across markets for goods and services? Understanding the relationship between market structure and performance is critical for determining effective economic policy governing anti-trust, intellectual property, industry regulation, and international...

This paper develops a dynamic model of retail competition and uses it to study the impact of the expansion of a new national competitor on the structure of urban markets. In order to accommodate substantial heterogeneity (both observed and unobserved) across agents and markets, the paper first...

Coupling weekly grocery transaction records with the exact location and opening date of entering Walmarts over an eleven year period, we examine how Supercenter entry affects prices and revenues at incumbent supermarkets. We find that entry within one mile of an incumbent causes a sharp 16% drop...

This paper develops a dynamic model of retail competition and uses it to study the impact of the expansion of a new national competitor on the structure of urban markets. In order to accommodate substantial heterogeneity (both observed and unobserved) across agents and markets, the paper first...

We propose a framework for analyzing spatial competition between retailers of different formats. Our approach yields localized measures of concentration and store-level diversion ratios that can be used to prospectively evaluate mergers in highly differentiated retail markets. Our method does...

This paper develops a dynamic model of retail competition and uses it to study the impact of the expansion of a new national competitor on the structure of urban markets. In order to accommodate substantial heterogeneity (both observed and unobserved) across agents and markets, the paper first...