Chapter 2 develops a non-parametric approach to empirically determine the geographic size of a market. I study the impact of a new store entry on competing stores in an increasing range to the site of entry. I apply the estimator to the Swiss grocery retail industry and find that markets are...

Assortment decisions are key strategic instruments for firms responding to local market conditions. We assess this claim by studying the effect of a national merger between two large Dutch supermarket chains on prices and on the depth as well as composition of assortment. We adopt a...