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Inferring Inequality with Home Production

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  • Karabarbounis, Loukas
  • Boerma, Job

Abstract

We revisit the causes, welfare consequences, and policy implications of the dispersion in households' labor market outcomes using a model with uninsurable risk, incomplete asset markets, and home production. Allowing households to be heterogeneous in both their disutility of home work and their home production efficiency, we find that home production amplifies welfare-based differences meaning that inequality in standards of living is larger than we thought. We infer significant home production efficiency differences across households because hours working at home do not covary with consumption and wages in the cross section of households. Heterogeneity in home production efficiency is essential for inequality, as home production would not amplify inequality if differences at home only reflected heterogeneity in disutility of work.

Suggested Citation

  • Karabarbounis, Loukas & Boerma, Job, 2019. "Inferring Inequality with Home Production," CEPR Discussion Papers 13554, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:13554
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    1. Richard Blundell & Luigi Pistaferri & Itay Saporta-Eksten, 2018. "Children, Time Allocation, and Consumption Insurance," Journal of Political Economy, University of Chicago Press, vol. 126(S1), pages 73-115.
    2. Greenwood, Jeremy & Hercowitz, Zvi, 1991. "The Allocation of Capital and Time over the Business Cycle," Journal of Political Economy, University of Chicago Press, vol. 99(6), pages 1188-1214, December.
    3. Marcet, Albert & Obiols-Homs, Francesc & Weil, Philippe, 2007. "Incomplete markets, labor supply and capital accumulation," Journal of Monetary Economics, Elsevier, vol. 54(8), pages 2621-2635, November.
    4. Constantinides, George M & Duffie, Darrell, 1996. "Asset Pricing with Heterogeneous Consumers," Journal of Political Economy, University of Chicago Press, vol. 104(2), pages 219-240, April.
    5. Mark Aguiar & Mark Bils, 2015. "Has Consumption Inequality Mirrored Income Inequality?," American Economic Review, American Economic Association, vol. 105(9), pages 2725-2756, September.
    6. Benhabib, Jess & Rogerson, Richard & Wright, Randall, 1991. "Homework in Macroeconomics: Household Production and Aggregate Fluctuations," Journal of Political Economy, University of Chicago Press, vol. 99(6), pages 1166-1187, December.
    7. repec:hal:wpspec:info:hdl:2441/8623 is not listed on IDEAS
    8. Rupert, Peter & Rogerson, Richard & Wright, Randall, 2000. "Homework in labor economics: Household production and intertemporal substitution," Journal of Monetary Economics, Elsevier, vol. 46(3), pages 557-579, December.
    9. Raj Chetty & Adam Guren & Day Manoli & Andrea Weber, 2013. "Does Indivisible Labor Explain the Difference between Micro and Macro Elasticities? A Meta-Analysis of Extensive Margin Elasticities," NBER Macroeconomics Annual, University of Chicago Press, vol. 27(1), pages 1-56.
    10. Charles I. Jones & Peter J. Klenow, 2016. "Beyond GDP? Welfare across Countries and Time," American Economic Review, American Economic Association, vol. 106(9), pages 2426-2457, September.
    11. Aiyagari, S. Rao & McGrattan, Ellen R., 1998. "The optimum quantity of debt," Journal of Monetary Economics, Elsevier, vol. 42(3), pages 447-469, October.
    12. Karabarbounis, Loukas, 2014. "Home production, labor wedges, and international business cycles," Journal of Monetary Economics, Elsevier, vol. 64(C), pages 68-84.
    13. Laurens Cherchye & Thomas Demuynck & Bram De Rock & Frederic Vermeulen, 2017. "Household Consumption When the Marriage Is Stable," American Economic Review, American Economic Association, vol. 107(6), pages 1507-1534, June.
    14. Pierre-Olivier Gourinchas & Jonathan A. Parker, 2002. "Consumption Over the Life Cycle," Econometrica, Econometric Society, vol. 70(1), pages 47-89, January.
    15. Dirk Krueger & Fabrizio Perri, 2004. "On the Welfare Consequences of the Increase in Inequality in the United States," NBER Chapters, in: NBER Macroeconomics Annual 2003, Volume 18, pages 83-138, National Bureau of Economic Research, Inc.
    16. Josep Pijoan-Mas, 2006. "Precautionary Savings or Working Longer Hours?," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 9(2), pages 326-352, April.
    17. Storesletten, Kjetil & Telmer, Christopher I. & Yaron, Amir, 2004. "Consumption and risk sharing over the life cycle," Journal of Monetary Economics, Elsevier, vol. 51(3), pages 609-633, April.
    18. Gilbert Ghez & Gary S. Becker, 1975. "The Allocation of Time and Goods over the Life Cycle," NBER Books, National Bureau of Economic Research, Inc, number ghez75-1.
    19. S. Rao Aiyagari, 1994. "Uninsured Idiosyncratic Risk and Aggregate Saving," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 109(3), pages 659-684.
    20. Rupert, Peter & Rogerson, Richard & Wright, Randall, 1995. "Estimating Substitution Elasticities in Household Production Models," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 6(1), pages 179-193, June.
    21. Urban J. Jermann & Marianne Baxter, 1999. "Household Production and the Excess Sensitivity of Consumption to Current Income," American Economic Review, American Economic Association, vol. 89(4), pages 902-920, September.
    22. Jonathan Guryan & Erik Hurst & Melissa Kearney, 2008. "Parental Education and Parental Time with Children," Journal of Economic Perspectives, American Economic Association, vol. 22(3), pages 23-46, Summer.
    23. Chang-Tai Hsieh & Peter J. Klenow, 2009. "Misallocation and Manufacturing TFP in China and India," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 124(4), pages 1403-1448.
    24. Nezih Guner & Remzi Kaygusuz & Gustavo Ventura, 2014. "Income Taxation of U.S. Households: Facts and Parametric Estimates," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 17(4), pages 559-581, October.
    25. Roland Benabou, 2002. "Tax and Education Policy in a Heterogeneous-Agent Economy: What Levels of Redistribution Maximize Growth and Efficiency?," Econometrica, Econometric Society, vol. 70(2), pages 481-517, March.
    26. McGrattan, Ellen R & Rogerson, Richard & Wright, Randall, 1997. "An Equilibrium Model of the Business Cycle with Household Production and Fiscal Policy," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 38(2), pages 267-290, May.
    27. Gilbert Ghez & Gary S. Becker, 1975. "A Theory of the Allocation of Time and Goods Over the Life Cycle," NBER Chapters, in: The Allocation of Time and Goods over the Life Cycle, pages 1-45, National Bureau of Economic Research, Inc.
    28. Michael Dotsey & Wenli Li & Fang Yang, 2014. "Consumption And Time Use Over The Life Cycle," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 55(3), pages 665-692, August.
    29. Harley Frazis & Jay Stewart, 2011. "How does household production affect measured income inequality?," Journal of Population Economics, Springer;European Society for Population Economics, vol. 24(1), pages 3-22, January.
    30. Deaton, Angus & Paxson, Christina, 1994. "Intertemporal Choice and Inequality," Journal of Political Economy, University of Chicago Press, vol. 102(3), pages 437-467, June.
    31. Richard Blundell & Luigi Pistaferri & Itay Saporta-Eksten, 2016. "Consumption Inequality and Family Labor Supply," American Economic Review, American Economic Association, vol. 106(2), pages 387-435, February.
    32. Jonathan Heathcote & Fabrizio Perri & Giovanni L. Violante, 2010. "Unequal We Stand: An Empirical Analysis of Economic Inequality in the United States: 1967-2006," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 13(1), pages 15-51, January.
    33. Emanuela Cardia & Paul Gomme, 2018. "Market Work, Housework and Childcare: A Time Use Approach," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 29, pages 1-14, July.
    34. Acemoglu, Daron & Autor, David, 2011. "Skills, Tasks and Technologies: Implications for Employment and Earnings," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 12, pages 1043-1171, Elsevier.
    35. Greg Kaplan, 2012. "Inequality and the life cycle," Quantitative Economics, Econometric Society, vol. 3(3), pages 471-525, November.
    36. Richard Blundell & Luigi Pistaferri & Ian Preston, 2008. "Consumption Inequality and Partial Insurance," American Economic Review, American Economic Association, vol. 98(5), pages 1887-1921, December.
    37. Boerma, Job & Karabarbounis, Loukas, 2020. "Labor market trends and the changing value of time," Journal of Economic Dynamics and Control, Elsevier, vol. 115(C).
    38. Nezih Guner & Remzi Kaygusuz & Gustavo Ventura, 2014. "Income Taxation of U.S. Households: Facts and Parametric Estimates," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 17(4), pages 559-581, October.
    39. Dirk Krueger & Fabrizio Perri, 2006. "Does Income Inequality Lead to Consumption Inequality? Evidence and Theory -super-1," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 73(1), pages 163-193.
    40. Jeremy Lise & Ken Yamada, 2019. "Household Sharing and Commitment: Evidence from Panel Data on Individual Expenditures and Time Use," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 86(5), pages 2184-2219.
    41. repec:hal:spmain:info:hdl:2441/8623 is not listed on IDEAS
    42. Mark Aguiar & Erik Hurst, 2013. "Deconstructing Life Cycle Expenditure," Journal of Political Economy, University of Chicago Press, vol. 121(3), pages 437-492.
    43. Tom Krebs, 2003. "Human Capital Risk and Economic Growth," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(2), pages 709-744.
    44. Jonathan Heathcote & Kjetil Storesletten & Giovanni L. Violante, 2014. "Consumption and Labor Supply with Partial Insurance: An Analytical Framework," American Economic Review, American Economic Association, vol. 104(7), pages 2075-2126, July.
    45. Tom Krebs, 2003. "Growth and Welfare Effects of Business Cycles in Economies with Idiosyncratic Human Capital Risk," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 6(4), pages 846-868, October.
    46. Mark Aguiar & Erik Hurst, 2005. "Consumption versus Expenditure," Journal of Political Economy, University of Chicago Press, vol. 113(5), pages 919-948, October.
    47. Mark Aguiar & Erik Hurst & Loukas Karabarbounis, 2013. "Time Use during the Great Recession," American Economic Review, American Economic Association, vol. 103(5), pages 1664-1696, August.
    48. Heathcote, Jonathan & Storesletten, Kjetil & Violante, Giovanni L., 2008. "Insurance and opportunities: A welfare analysis of labor market risk," Journal of Monetary Economics, Elsevier, vol. 55(3), pages 501-525, April.
    49. Gilbert Ghez & Gary S. Becker, 1975. "The Allocation of Goods Over the Life Cycle," NBER Chapters, in: The Allocation of Time and Goods over the Life Cycle, pages 46-82, National Bureau of Economic Research, Inc.
    50. Luigi Pistaferri, 2003. "Anticipated and Unanticipated Wage Changes, Wage Risk, and Intertemporal Labor Supply," Journal of Labor Economics, University of Chicago Press, vol. 21(3), pages 729-754, July.
    51. Gilbert Ghez & Gary S. Becker, 1975. "The Allocation of Time Over the Life Cycle," NBER Chapters, in: The Allocation of Time and Goods over the Life Cycle, pages 83-132, National Bureau of Economic Research, Inc.
    52. Orazio P. Attanasio & Luigi Pistaferri, 2016. "Consumption Inequality," Journal of Economic Perspectives, American Economic Association, vol. 30(2), pages 3-28, Spring.
    53. Huggett, Mark, 1993. "The risk-free rate in heterogeneous-agent incomplete-insurance economies," Journal of Economic Dynamics and Control, Elsevier, vol. 17(5-6), pages 953-969.
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    1. Inferring Inequality with Home Production
      by Christian Zimmermann in NEP-DGE blog on 2018-01-11 22:56:22

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    4. Boerma, Job & Karabarbounis, Loukas, 2020. "Labor market trends and the changing value of time," Journal of Economic Dynamics and Control, Elsevier, vol. 115(C).
    5. Andreas Tryphonides, 2023. "Identifying Preferences when Households are Financially Constrained," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 51, pages 521-546, December.
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    More about this item

    Keywords

    Home production; Labor supply; Consumption; Inequality;
    All these keywords.

    JEL classification:

    • D10 - Microeconomics - - Household Behavior - - - General
    • D60 - Microeconomics - - Welfare Economics - - - General
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • J22 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Time Allocation and Labor Supply

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