We model the contest among full-service advertising agencies as a score auction. The score auction allows the advertiser to select the agency that offers the best combination of creative quality and media cost, and to determine the contract price. To participate in the contest, each agency needs...

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...