This paper examines empirically the relationship between innovation and market structure within a simultaneous … concentration. In contrast, competition enforces innovation, i.e. sales concentration has a negative impact on R&D. …

We study the gains from trade in a model with oligopolistic competition, heterogeneous firms and innovation, and … concentration contributes substantially to the gains from trade, mostly via its stimulating effect on innovation. Sizeable gains …

concentration upon innovation, focusing on robust findings, questions of interpretation, and the identification of major gaps. We … also consider the more modest literature that considers the effect on innovation of firm characteristics other than size …

research and incentives for innovation. We then summarize the pricing and marketing of drugs in the US and several other …

incentives for market design innovation. The novel tension between private and social innovation incentives is incumbents' rents …