This study compares prices offered by multiple Internet retailers. This task is challenging because e-tailers cannot present their entire assortments to each consumer. Therefore, the quality of the product assortments presented by different e-tailers to each consumer is not directly comparable...

One of the main problems in assessing the relative efficiency of multiple retail outlets is the fact that customers are an essential component of the "production process" in retailing. Hence, the efficiency of a particular retail store depends both on the seller's and the buyers' efficiency....