Discussion paper DP835 Do Firms' Product Lines Include Too Many Varieties, and Do Shops Open Too Many Days? Paul Klemperer Jorge Padilla 31 Aug 1993 Applied Macroeconomics D43 L13 L41
Discussion paper DP446 Product Line Competition and Shopping Costs: Why Firms May Choose to Compete Head-to-Head Paul Klemperer 1 Aug 1990 Applied Macroeconomics D L