This paper compares R&D competition and cooperation when firms can devote resources to a ‘safe’ investment or a risky R&D investment. When the discovery of a new product creates positive externalities on non‐discovering firms, equilibrium investment flow, ex ante investment, and welfare...

Learning-by-doing and organizational forgetting have been shown to be important in a variety of industrial settings. This paper provides a general model of dynamic competition that accounts for these economic fundamentals and shows how they shape industry structure and dynamics. Previously...