I show that the indivisible labor' models of Diamond and Mirrlees (1978, 1986), Hansen (1985), Rogerson (1988), Christiano and Eichenbaum (1992), and many others are, when aggregated across persons with the same marginal utility of income, equivalent to the divisible labor model of Lucas and...

The role of inventories in making prices "sticky" is studied by analyzing a dynamic linear-quadratic model of a monopoly firm facing stochastic demand, but able to store its finished goods in inventory. It is shown that, in contrast to the usual presumption, firms that exhibit the smallest...

This chapter studies how incomplete information helps accommodate frictions in coordination, leading to novel insights on the joint determination of expectations and macroeconomic outcomes. We review and synthesize recent work on global games, beauty contests, and their applications. We...

An emerging consensus on the future of macroeconomics views the incorporation of a role for financial intermediation, labor market frictions, and household heterogeneity in the presence of uninsurable unemployment risk as key needed extensions to the benchmark macro framework. I argue that this...

In 1944 Franco Modigliani published a famous article summarizing the Keynesian model; in 1963 he extended the 1944 framework. This paper,written for a conference in honor of Modigliani, asks how the earlier papers would be modified in the light of recent developments in macroeconomics. The...

This paper is a review of rational expectations models used in macroeconomic research. The purpose is to examine in some detail the differences between the models, the advantages and disadvantages of alternative models the empirical support for the models and their policy implications. The main...

An otherwise conventional Keynesian macro model is modified to include inventories of final goods by (1) drawing a distinction between production and final sales, and (2) allowing for a negative effect of the level of inventories on production. Two models are presented: one in which the labor...

We describe some of the main features of the recent vintage macroeconomic models used for monetary policy evaluation. We point to some of the key differences with respect to the earlier generation of macro models, and highlight the insights for policy that these new frameworks have to offer. Our...