Henrik Kleven
Kristian Jakobsen
Katrine Marie Jakobsen
Alessandro Guarnieri
Tanguy van Ypersele
Fabien Petit
Cecilia García-Peñalosa
Yonatan Berman
Nina Weber
Julian Limberg
David Hope
Pedro Tremacoldi-Rossi
Tatiana Mocanu
Marco Ranaldi
Silvia Vannutelli
Raymond Fisman
John Voorheis
Reed Walker
Janet Currie
Roel Dom
Marcos Vera-Hernández
Emla Fitzsimons
José V. Rodríguez Mora
Tomasa Rodrigo
Álvaro Ortiz
Stephen Hansen
Vasco Carvalho
Gergely Buda
Gabriel Zucman
Anders Jensen
Matthew Fisher-Post
José-Alberto Guerra
Myra Mohnen
Christopher Timmins
Ignacio Sarmiento-Barbieri
Peter Christensen
Linda Wu
Gaurav Khatri
Julián Costas-Fernández
Eleonora Patacchini
Jorgen Harris
Marco Battaglini
Ricardo Fernholz
Alberto Bisin
Jess Benhabib
Cian Ruane
Pete Klenow
Mark Bils
Peter Hull
Will Dobbie
David Arnold
Eric Zwick
Owen Zidar
Matt Smith
Ansgar Walther
Tarun Ramadorai
Paul Goldsmith-Pinkham
Andreas Fuster
Ellora Derenoncourt
Golvine de Rochambeau
Vinayak Iyer
Jonas Hjort
Elena Simintzi
Paige Ouimet
Holger Mueller
Pablo Garriga
Gabriel Ulyssea
Costas Meghir
Pinelopi Koujianou Goldberg
Rafael Dix-Carneiro
Alessandro Toppeta
Áureo de Paula
Orazio Attanasio
Seth Zimmerman
Joseph Price
Valerie Michelman
Camille Semelet
Anne Brockmeyer
Pierre Bachas
Santiago Pérez
Elisa Jácome
Leah Boustan
Ran Abramitzky
Jesse Rothstein
Jeffrey T. Denning
Sandra Black
Wei Cui
Mathieu Leduc
Philippe Jehiel
Shivam Gujral
Suraj Sridhar
Attila Lindner
Arindrajit Dube
Pascual Restrepo
Łukasz Rachel
Benjamin Moll
Kirill Borusyak
Michael McMahon
Frederic Malherbe
Gabor Pinter

Shocks, frictions, and inequality in US business cycles

What is this research about and why did you do it?

Inequality in income and wealth in the US has substantially increased since the 1980s and is frequently the subject of public debate. Potential policy responses depend on our understanding of the underlying drivers of inequality. We assess to what extent business cycles, and the policy responses to them, are an important contributor to inequality dynamics in the short and long run. This business cycle perspective expands the study of inequality, which has typically focused on permanent changes such as the rising skill premium or changes in the tax and transfer system.

How did you answer this question?

A new generation of monetary business cycle models that feature heterogeneous agents and incomplete markets, known as HANK models, allow us to study inequality through the lens of the business cycle. We use a full-information Bayesian approach that has become the standard practice in macroeconomics, extending this technique to the analysis of HANK models. We first estimate the model on aggregate time series only, covering the period from 1954 to 2015. We then re-estimate the model with two additional observables for the shares of wealth and income held by the top 10% of households in each of these dimensions.

What did you find?

We find that business cycle shocks explain a substantial fraction of movements in inequality because they generate very persistent movements in wealth and income inequality, shown by the black line in the figure below. These movements are consistent with the U-shaped evolution of US inequality during the period from 1954 to 2015. In the HANK model, transitory shocks persistently redistribute across households because wealth accumulates past shocks and has a long memory. 

The black line shows the evolution of the top 10% wealth share (measured by log deviations) and the contribution of ten sources of shocks implied by the model. Shaded areas correspond to NBER-dated recessions.

Our analysis suggests that increasing price mark-ups, high equity returns (indicated in the figure by investment-specific technology shocks), and low tax progressivity are key drivers of the increase in wealth inequality since the 1980s, while monetary shocks do not play an important role.

What implications does this have for the research on wealth concentration or economic inequality?

Future research on inequality should take business cycles into account, and the study of optimal business cycle policy should take inequality into account. A framework that allows for permanent and transitory shocks is required to study the interaction between trends like skill premia and recessions. Our findings further suggest exploring the implications for inequality of shocks that affect household insurance and portfolios for the business cycle.

What are the next steps in your agenda?

Understanding differences in portfolios is key to understanding wealth inequality. We will further explore:

  • the heterogeneity in household portfolios, 
  • the liquidity of asset markets,
  • the importance of fluctuations in the liquidity of an asset for portfolio choices and the business cycles.


Citation and related resources

This paper can be cited as follows: Bayer, C., Born, B., Luetticke, R. (2020). 'Shocks, Frictions, and Inequality in US Business Cycles.' CEPR Discussion Paper 14364. Available at:

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