We investigate the timing of adoption of product and process innovation by using a differential game in which firms may invest in both activities. We consider horizontal product innovation that reduces product substitutability, and process innovation that reduces marginal cost. First, we...

We model the optimal behaviour of a multiproduct monopolist investing both in process and in product innovation in a dynamic setting. Product innovation reduces the degree of substitutability between any two varieties. First, we find that R&D efforts increase in both directions as the number of...

Coopting 'decisive' technical advances / Morton I. Kamien, Israel Zang -- Efficiency of joint enterprises with internal bargaining / Luca Lambertini, Sougata Poddar, Dan Sasaki -- Equilibrium research joint ventures / Ping Lin -- Innovation, duplication, and the contract theory of patents /...