This paper argues that an important part of movements in asset prices may be caused by neither external news nor irrationality, but the by revelation of information by the trading process itself. Two models are developed that illustrate this general idea. One model is based on investor...

This paper points out and tests a straight forward but previously unnoticed prediction of models in which the absence of precommitment in monetary policy leads to excessive inflation. Because unanticipated monetary expansion leads to real exchange rate depreciation, and because the harms of real...

The classic models of staggered adjustment of Taylor and Blanchard takes the frequency of price or wage adjustment as exogenous. This paper develops a model in which the frequency of price changes in endogenous. It then uses the model to analyze the effects of changes in the parameters of the...