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We develop a model which accounts for the observed equity premium and average risk free rate, without implying counterfactually high risk aversion. The model also does well in accounting for business cycle phenomena. With respect to the conventional measures of business cycle volatility and comovement with output, the model does roughly as well as the standard business cycle model. On two other dimensions, the model's business cycle implications are actually improved. Its enhanced internal propagation allows it to account for the fact that there is positive persistence in output growth, and the model also provides a resolution to the 'excess sensitivity puzzle' for consumption and income. Key features of the model are habit persistence preferences, and a multisector technology with limited intersectoral mobility of factors of production.
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There are significant differences in the dynamics of employment over the business cycle between young and old manufacturing plants. Young plants are more sensitive to aggregate disturbances, and they respond to them along different margins. We interpret these differences as reflecting greater organizational flexibility at young plants due to the changing nature of a plant's environment as it ages. In the presence of aggregate uncertainty, differences between young and old plants' organizational flexibility allows the model to reproduce their distinct cyclical characteristics. Previous empirical studies show that small firms generally respond by more to aggregate shocks than do large firms. To the extent that small firms tend to operate young plants, our analysis suggests an alternative to conventional explanations of this evidence which appeal to imperfections in credit markets.
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Can variants of the classic Calvo (1983) model of sticky prices account for the statistical behavior of post-war US inflation? We develop and test versions of the model for which the answer to this question is yes. We then investigate whether these models imply plausible degrees of inertia in price setting behavior by firms. We find that they do, but only if we depart from two auxiliary assumptions made in standard expositions of the Calvo model. These assumptions are that monopolistically competitive firms face a constant elasticity of demand and capital can be instantaneously reallocated after a shock. When we modify these assumptions our model is consistent with the view that firms re-optimize prices
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We provide a simple explanation for the observation that the variance of job destruction is greater than the variance of job creation: job creation is costlier at the margin than job destruction. As Caballero [2] has argued, asymmetric employment adjustment costs at the establishment level need not imply asymmetric volatility of aggregate job flows. We construct an equilibrium model in which (S,s)-type employment policies respond endogenously to aggregate shocks. The microeconomic asymmetries in the model can dampen the response of total job creation to an aggregate shock and cause it to be less volatile than total job destruction. This is so even though aggregate shocks are symmetrically distributed.
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This paper investigates the consequences of an exogenous increase in U.S. government purchases. We find that in response to such a shock, employment, output, and nonresidential investment rise, while real wages, residential investment, and consumption expenditures fall. The paper argues that a simple variant of the neoclassical model which distinguishes between nonresidential and residential investment is consistent with this evidence.
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This paper analyzes the ability of a general equilibrium efficiency wage model to account for the estimated response of hours worked and of real wages to a fiscal policy shock. Our key finding is that the model cannot do so unless we make the counterfactual assumption that marginal tax rates are constant. The model shares the strengths and weaknesses of high labor supply elasticity Real Business Cycle models. In particular it can account for the conditional volatility of real wages and hours worked. But it cannot account for the temporal pattern of how these variables respond to a fiscal policy shock and generates a counterfactual negative conditional correlation between government purchases and hours worked.
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This paper studies how producers' idiosyncratic risks affect an industry's aggregate dynamics in an environment where certainty equivalence fails. In the model, producers can place workers in two types of jobs, organized and temporary. Workers are less productive in temporary jobs, but creating an organized job requires an irreversible investment of managerial resources. Increasing productivity risk raises the value of an unexercised option to create an organized job. Losing this option is one cost of immediate organized job creation, so an increase in its value induces substitution towards cheaper temporary jobs. Because they are costless to create and destroy, a producer using temporary jobs can be more flexible, responding more to both idiosyncratic and aggregate shocks. If all of an industry's producers adapt to heightened idiosyncratic risk in this way, the industry as a whole can respond more to a given aggregate shock. This insight is used to better understand the observation from the U.S. manufacturing sector that groups of plants displaying high idiosyncratic variability also have large aggregate fluctuations.