This paper examines firm strategy when competitors are at different points along the learning curve. It shows that firms high on the learning curve will have strong incentives to exclude new competitors, while firms that are learning more slowly will have weaker incentives to hinder new...

This paper investigates optimal monetary policy in an economy, in which the output-inflation trade off faced by the central bank is influenced by two important forces: (i) the presence of uncertain and possibly changing parameters, and (ii) private sector expectations regarding the central...