A wider RJV extension hastens process innovations at the cost of increasing collusion in the .nal market. In a Cournot model, an extended RJV is welfare enhancing only when the Antitrust Authority is strong, so that the increase in distortion is limited, and when the size of the technical...

We develop a dynamic duopoly, where .rms have to take into account a technological externality, that reduces over time their innovation costs, and an inter-.rm spillover, that lowers only the second comer.s R&D cost. This spillover exerts its e¤ect after a disclosure lag. We identify three...