This paper shows that when agents learn from prices, large private uncertainty may result from a small amount of heterogeneity. As in a Phelps-Lucas island model, final producers look at the prices of their local inputs to infer aggregate conditions. However, market linkages between islands make...

No. Even if firms reset their prices more frequently when they face higher uncertainty, monetary policy may not be less effective in boosting real activity when firms become less responsive to monetary policy. In this case, the real effect of monetary policy can be strengthened even though they...