This paper develops a model of unemployment fluctuations. The model keeps the architecture of the Barro and Grossman … flexible to completely rigid. With some price rigidity, aggregate demand influences unemployment through a simple mechanism … thus increases labor demand, which in turn reduces unemployment. We use the comparative-statistics predictions of the model …

of aggregate unemployment in postwar data. While this range may seem wide it is an indication that the importance of …

other industrial sectors, in agriculture, and in services, as well as unemployment and non-participation in the labor force …

measure construction and technology busts) have little effect on the natural rate of unemployment or on long run productivity … of unemployment and can count for a 0.5% rise in cyclical unemployment from 2007 through the end of 2009 and 0.3% through …

stochastic volatility model of sectoral employment growth. Reallocative shocks have no effect on the natural rate of unemployment … the rise in trend unemployment in Germany in the 1980s or for a possible rise in trend unemployment in the United States …

built into the models' premises). The last part of the paper contains my assessment of Lucas's ideas. First, I bring out the …