Research

Abstract:

In this paper, we revisit the question of what the welfare costs of business cycles are with new insights. The seminal paper by Lucas (1987) found welfare costs to be negligible at around 1%, but subsequent literature focused on finding mechanisms that could rationalize larger welfare costs. Our study builds on recent research that incorporates incomplete markets, adjustment costs, and marginal propensities to consume to show that welfare costs can be substantial. Our calculations indicate that eliminating business cycle fluctuations would result in a 1.25% increase in welfare, as measured in consumption equivalents. Furthermore, using a 2-asset HANK model, we find a welfare cost of 2.6%. This result arises from considering portfolio adjustment costs, which generate a distribution of marginal propensities to consume along the income dimension that is empirically plausible and produces a share of (rich and poor) hand-to-mouth households that is consistent with recent findings. In periods of recession, these values rise to 11.1%. These results are particularly driven by effects from the price rigidity.

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Abstract:

We argue that the fiscal multiplier of government purchases is nonlinear in the size of the spending shock. In particular, the multiplier is increasing in the spending shock, with more expansionary government spending shocks generating larger multipliers and more contractionary shocks generating smaller multipliers. We document that empirically this holds true across time, countries and types of shocks. We then propose a neoclassical mechanism that hinges on the relationship between fiscal shocks, their form of financing, and the response of labor supply across the wealth distribution. A neoclassical incomplete markets model predicts that the aggregate labor supply elasticity is increasing in the spending shock, and this holds regardless of whether shocks are deficit- or balanced-budget financed. We show this mechanism to still be the driving force of the nonlinear effects of fiscal policy in the presence of nominal price rigidities. We find evidence for our mechanism using micro-data for the US. 

Journal of Public Economics, 252, December 2025, 105517Click here for the last version.