A vector autoregression is a reduced-form representation, and, therefore, would be expected to change when any structural equation in the system changes, regardless of whether economic decisions are forward-looking. Even so, a dynamic simulation of a model with unit roots will exhibit large...

This paper investigates a general equilibrium model of unemployment and the business cycle in which specialization of labor plays a key role. A rational expectations equilibrium with ful ly flexible wages and prices can exhibit unemployment in which the ma rginal product of employed workers...

Futures prices were well above spot prices for most commodities during most of the Great Depression; evidently the spectacular declines in agricultural prices caught many people by surprise. Based on the historical correlations between commodity prices and consumer prices, commodity markets...

The value of the dollar appears to move in one direction for long periods of time. The authors develop a new statistical model of exchange rate dynamics as a sequence of stochastic, segmented time trends. They reject the null hypothesis that exchange rates follow a random walk in favor of their...

The menu-cost interpretation of sticky prices implies that the probability of a price change should depend on the past history of prices and fundamentals only through the gap between the current price and the frictionless price. We find that this prediction is broadly consistent with the...