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Optimal Macroeconomic Policies in a Heterogeneous World
We study a DSGE model with “massive” heterogeneity, enough to approach Gini coefficients for income, wealth, and consumption in the U.S. data. The economy features three aggregate shocks as well as both permanent and temporary idiosyncratic risk. We introduce policymakers that can mitigate these risks for households, and a welfare theorem outlines how the proposed policies imply an optimal allocation of resources. The proposed policies include achieving the Wicksellian natural real rate of interest, social insurance, and a set of taxes and transfers designed to reduce consumption inequality. We calibrate the model to U.S. data from 1995 to 2023 assuming the optimal set of policies and argue that the model fit is promising. This suggests that, broadly speaking, U.S. macroeconomic policy has in recent decades been close to optimal. Improvements beyond this set of policies requires design of responses to very large shocks, and we suggest some directions in which such a design may proceed.
期刊介绍：
The IMF Economic Review is the official research journal of the International Monetary Fund (IMF). It is dedicated to publishing peer-reviewed, high-quality, context-related academic research on open-economy macroeconomics. It emphasizes rigorous analysis with an empirical orientation that is of interest to a broad audience, including academics and policymakers. Studies that borrow from, and interact with, other fields such as finance, international trade, political economy, labor, economic history or development are also welcome.
The views presented in published papers are those of the authors and should not be attributed to, or reported as, reflecting the position of the IMF, its Executive Board, or any other organization mentioned herein.
Comments
“The IMF Economic Review has been uniquely successful in publishing papers that rigorously analyze real international macroeconomic problems and in a manner that has immediate policy relevance. This success is owed to a great extent to the high quality of the editorial board, which is able to identify papers that are both relevant for policy and are executed using state-of-the-art tools so as to make the analysis compelling.” - Gita Gopinath, Economic Counsellor and Director of Research, IMF
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“To navigate the global crisis, and to take the best policy decisions, will require mobilizing and extending the knowledge we have about open economy macro, from the implications of liquidity traps, to the dangers of large fiscal deficits, to macro-financial interactions, to the contours of a better international monetary and financial system. My hope and my expectation is that the IMF Economic Review will be central to the effort.” - Olivier J. Blanchard, Peterson Institute for International Economics; former Economic Counsellor and Director of Research Department, IMF
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