We study the effect of the competitive selection process on the economy's rate of growth. In an extension of standard quality-ladder models of endogenous growth, we allow for the possibility that in each period several asymmetric firms (representing an endogenously determined number of past...

We propose a dynamic model of a patent portfolio race in an industry in which innovation is incremental. Two firms compete in prices and in research. We study the Markov perfect (closed-loop) equilibrium of the resulting differential game, identifying a steady state in which firms compete neck...

The paper studies the regulatory design in an industry where the regulated downstream provider of services to final consumers purchases the necessary inputs from an upstream supplier. The model is closely inspired by the UK regulatory mechanism for the railway network. Its philosophy is one of...

"In this paper, we compare Bertrand and Cournot equilibria in a differentiated duopoly with linear demand and cost functions. We extend the Singh and Vives (1984) model by allowing for a wider range of cost and demand (product quality) asymmetry between firms. Focusing on the case of substitute...