Does Greater Inequality Lead to More Household Borrowing? New Evidence from Household Data
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FEDERAL RESERVE BANK OF SAN FRANCISCO WORKING PAPER SERIES Does Greater Inequality Lead to More Household Borrowing? New Evidence from Household Data Olivier Coibion UT Austin and NBER Yuriy Gorodnichenko UC Berkeley and NBER Marianna Kudlyak Federal Reserve Bank of San Francisco John Mondragon Northwestern University August 2016 Working Paper 2016-20 http://www.frbsf.org/economic-research/publications/working-papers/wp2016-20.pdf Suggested citation: Coibion, Olivier, Yuriy Gorodnichenko, Marianna Kudlyak, John Mondragon. 2016. “Does Greater Inequality Lead to More Household Borrowing? New Evidence from Household Data” Federal Reserve Bank of San Francisco Working Paper 2016-20. http://www.frbsf.org/economic-research/publications/working-papers/wp2016-20.pdf The views in this paper are solely the responsibility of the authors and should not be interpreted as reflecting the views of the Federal Reserve Bank of San Francisco or the Board of Governors of the Federal Reserve System. Does Greater Inequality Lead to More Household Borrowing? New Evidence from Household Data Olivier Coibion Yuriy Gorodnichenko UT Austin and NBER UC Berkeley and NBER [email protected] [email protected] Marianna Kudlyak John Mondragon Federal Reserve Bank of San Francisco Northwestern University [email protected] [email protected] First Draft: December, 2013 This Draft: August, 2016 Abstract: Using household-level debt data over 2000-2012 and local variation in inequality, we show that low-income households in high-inequality regions (zip-codes, counties, states) accumulated less debt (relative to their income) than low-income households in lower-inequality regions, contrary to the prevailing view. Furthermore, the price of credit is higher and access to credit is harder for low-income households in high-inequality versus low-inequality regions. Lower quantities combined with higher prices suggest that the debt accumulation pattern by household income across areas with different inequality is a result of credit supply rather than credit demand. We propose a lending model to illustrate the mechanism. JEL: E21, E51, D14, G21 Keywords: inequality, household debt, credit, income, Great Recession We are grateful to Meta Brown, Donghoon Lee, and seminar participants at the CES-Ifo, Cologne, CREI, Boston College, LBS, NBER SI ME and EFACR, Rice, SED in Toronto, Tinbergen Institute, U. of Houston, VCU, FRB New York, FRB Richmond, FRB St. Louis, FRB San Francisco, FRB Philadelphia Payments Center, FR Board, Bank of Netherlands, European University Institute, EEA-ESEM in Toulouse, EEA-ESEM in Mannheim, BYU Red Rock Conference in Utah, IBEFA conference in Denver for helpful comments. The views expressed here are those of the authors and do not reflect those of the Federal Reserve Bank of San Francisco or the Federal Reserve System or any other institution with which the authors are affiliated. Mondragon thanks the Richmond Fed for their generous support while part of this paper was written as well as support from the NSF. Gorodnichenko thanks the NSF and Sloan Foundation for financial support. 1 Introduction The financial crisis of 2008-09 was preceded by an exceptional rise in borrowing by U.S. households, which had been on a rise since the 1980s. Over the same period, income inequality in the U.S. increased to the highest levels seen in the post-war period (see Figure 1). These striking movements motivate a question about a possible link between the two trends, and, in particular, whether the rise in income inequality may have caused some of the increase in household leverage. Establishing a causal link has proven challenging for modern theories of consumption and income. A large literature documents that the rising inequality is a result of permanent changes of incomes rather than temporary increases in income volatility;1 standard theory then predicts that households facing permanent declines in income should adjust their consumption downwards and curb their borrowing. To rationalize the increase in household debt, the literature has called for alternative consumption theories and explanations: keeping up with the rich/Joneses (Veblen, 1899), expenditure cascades (Frank, Levine, and Dijk, 2014), a need to sustain past living standards (Stiglitz, 2009), or government incentives to lenders for expanding credit to low-income groups (Rajan, 2010). Implicit in these mechanisms is an assumption that the increased debt is mainly driven by lower- income households.2 The assumption also appears in-line with the prevailing view of the role the low- income/subprime segment in the 2008-09 crisis.3 Despite the issue being at the heart of the debate regarding the 2007-09 crisis, no evidence exists on how household debt accumulations across income groups varies with income inequality. In this paper, we study how household debt accumulation varied with income inequality over 2000-2012. Is it the case that poorer households accumulated more debt when faced with higher inequality? We use nationally- representative household-level U.S. credit bureau data from the New York Federal Reserve Bank Consumer Credit Panel/Equifax (CCP) which provide comprehensive panel data on debt for millions of U.S. households since 1999. First, we exploit cross-sectional variation in income inequality (zip codes, counties and states) and examine how household debt accumulation (relative to income) varied with a household’s relative standing in the local income distribution and local income inequality. Our estimation of the evolution of household debt is akin to a “difference- in-differences” approach across income groups and regional inequality levels. Considerable cross-sectional variation in local inequality allows us to conduct numerous subsample and robustness checks to isolate the role of inequality from other potential local influences.4 Second, we use loan application data from Home Mortgage 1 See, for example, Moffitt and Gottschalk (2002, 2008), Sablehaus and Song (2009), Kopczuk, Saez, and Song (2010), Piketty and Saez (2013). 2 A long line of behavioral thought rationalizes income dispersion effects on household debt through “keeping up” motives. As inequality increases, high-income households are able to consume relatively more than low-income households. If low-income households experience a disutility from not consuming equivalent amounts as high-income households, they might try to maintain a higher level of consumption, potentially funded by debt. 3 See, for example, Mian and Sufi (2009), Demyanyk and Van Hemert (2011), Keys, Mukherjee, Seru, and Vig (2010), and Mian and Sufi (2014), among others. 4 Furthermore, much of the rise in income inequality in the U.S. since the 1970s reflects a rise in inequality within regions rather than inequality across regions. 1 Disclosure Act (HMDA) and examine how credit prices—interest on loans and access to credit—varied across regions with different local inequality for households with different incomes. In contrast to the prevailing view, we find that lower-income households accumulated less debt in high- inequality regions than lower-income households in low-inequality regions. Furthermore, we find that the price of credit is higher and the access to credit is harder for low-income borrowers in high inequality areas than for low-income borrowers in low inequality regions. Lower quantities combined with higher prices suggest that the patterns of debt accumulation by household income across areas with different inequality are likely a results of credit supply rather than a credit demand mechanism. To demonstrate the mechanism, we present a simple lending model in which lenders use household position in local income distribution and local inequality to draw inferences about borrowers’ types. Our work is the first to challenge the prevailing narrative of the 2007-09 financial crisis by which the growth in debt was driven by low-income/subprime borrowers.5 Consistent with modern theories of consumption, we find no evidence of low-income households driving the debt increase when faced with higher inequality and our results are broadly consistent with new evidence that consumption inequality is in fact mirroring income inequality (Aguiar and Bils, 2015). Our results find no evidence of banks disproportionately expanding credit to the low-income households which are typically high risk. As a side-product of our analysis, we develop a novel, reliable income imputation procedure for the credit bureau data. Specifically, while the CCP data provide detailed debt and location information, they do not contain information on income. Our imputation procedure exploits the relationship between household debt and income in the Survey of Consumer Finances. We demonstrate that our imputation is robust and capable of recovering local income distribution statistics with high accuracy. The imputation allows the study of the relationship between income and debt in an unprecedented detail and thus significantly increases the scope of the CCP. The results that low-income households in high-inequality regions borrowed relatively less than low- income households in low-inequality regions are robust to using different subsamples and specifications. The results hold within households with low or high credit scores, within regions which experienced either high or low home price appreciation, within households with either low or high initial debt levels, etc.; they hold across different levels of aggregation (zip code,