We provide a unified approach to imperfect (monopolistic, Bertrand and Cournot) competition equilibria with demand functions derived from symmetric preferences over a large but finite number of goods. The equilibrium markups depend on the Morishima Elasticity of Substitution/Complementarity...

We have estimated the demand for erythropoietin (EPO) using market data from the Scandinavian countries. Assuming that prices are set in a Nash-Bertrand game we determine the degree of competition in this Scandinavian market. We also report on the impact of product innovation on welfare, e.g on...

Based on the assumption that location is especially relevant in the lodging industry, we exploit a dataset of Spanish hotels to examine the relationship between spatial competition and retail price level and dispersion. Our results support the hypothesis that a greater density of competitors...

We develop a model of vertical innovation in which firms incur a market entry cost and choose a unique level of quality. Once established, firms compete for market shares, selling to consumers with heterogeneous tastes for quality. The equilibrium of the pricing game exists and is unique within...

We develop a product-differentiated model where the product space is a network defined as a set of varieties (nodes) linked by their degrees of substitutability (edges). We also locate consumers into this network, so that the location of each consumer (node) corresponds to her “ideal”...

We build on the imperfection of intellectual property rights as the central motivation for the organization of firms. There are several characteristics specific to a theory of the firm grounded on the absence of intellectual property rights: monetary incentive schemes arise naturally as a...

Based upon a large fraction of the price records used for computing the French CPI, we document consumer price rigidity in France. We first provide a methodological discussion of issues involved in estimating average price duration with micro-data. The average duration of prices in the sectors...

Price setting in German metal-working industries is analysed using a monthly panel of individual price data for more than 2,000 plants covering the period from 1980 to 2001. Motivated by several models in the literature, a duration model is estimated. Price changes can be explained by a...

We analyse the adjustment of retail and services prices in a period of low inflation, using a set of individual price data from the German Consumer Price Index that covers the years 1998 to 2003. We strong find evidence of time- and statedependent price adjustment. Most importantly, the...

This paper provides some new empirical features on price setting behaviour for French producers using micro data underlying the producer and business-services price indices over the period 1994-2005. Some crucial methodological issues on the collection of producer prices are raised. Then, the...