I incorporate an insight of Friedrich Hayek—that competition allows a thousand flowers to bloom, and discovers the best among them—into a model of Schumpeterian innovation. Firms face uncertainty about the optimal direction of innovation, so more innovations implies a higher expected value...

I develop a model of monopolistic competition in which I distinguish between niche markets and mass markets, in the spirit of Holmes and Stevens, 2014. Firms choose between entering a small niche market with high markups or a large mass market with low markups. Entry costs and other distortions...