This paper stresses the importance of heterogeneity in learning. We consider a Bertrand oligopoly with firms using either least squares learning or gradient learning for determining the price. We demonstrate that convergence properties of the rules are strongly affected by heterogeneity. In...

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...

Increasing inter-bank lending has an ambiguous impact on financial stability. Using a computational model with endogenous bank behavior and interest rates we identify the conditions under which inter-bank lending promotes stability through risk sharing or provides a channel through which...