We study the effect of a merger between two Dutch supermarket chains to assess its effect on the depth as well as composition of assortment. We adopt a difference-in-differences strategy that exploits local variation in the merger’s effects, controlling for selection on observables through a...

In many competitive settings consumers buy multiple product categories, and some prefer to use a single firm, generating complementary cross-category price effects. To study pricing in supermarkets, an organizational form where these effects are internalized, we develop a multi-category...

Recent decades have witnessed a distinct increase in the sales and popularity of private labels. The growing market share of private labels has transformed the landscape of retail competition in developed countries. Major retailers are no longer confined to their traditional roles of purchasers...