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Un Análisis Empírico de las No Linealidades en la Movilidad Intergeneracional del Ingreso. El caso de la Argentina

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  • Maribel Jiménez

    (Maestría en Economía - FCE - UNLP)

Abstract

The principal aim of this paper is quantify and examine intergenerational earnings mobility in Argentina, exploring particularly the hypothesis of variation of the degree of intergenerational (in)mobility across childs´s and parents’s income distribution, by the implementation of econometrics methods utilized in recent empirical literature for nonlongitudinal data. The results derived from the information of two samples from the Permanent Household Survey of 1986 and 2006 suggest that parents´s earnings correlate more strongly with daughter´s earnings than they do with that of a son. Also, intergenerational persistence varies across childs´s and parents’s income distribution. In general, the effect of father´s and mother´s earning is higher for childrens in the lower income quantiles. Moreover, the intergenerational income elasticities in every quantil of the childs, for different sections of parents’s income distribution, are considerably distinct. In synthesis, the results uncover the existence of significant nonlinearities in the intergenerational earnings relationship. El principal objetivo de este estudio es cuantificar y examinar la movilidad intergeneracional del ingreso en la Argentina, explorando la hipótesis de variación del grado de (in)movilidad a lo largo de la distribución del ingreso correspondiente a los hijos así como a los padres, a través de la aplicación de métodos econométricos utilizados en la literatura empírica reciente para datos no longitudinales. Los resultados, obtenidos a partir de la información proveniente de dos muestras de la Encuesta Permanente de Hogares de 1986 y 2006, sugieren que el ingreso laboral de los padres está correlacionado más fuertemente con el ingreso de las hijas que con el de los hijos varones. Asimismo, se observa que la persistencia intergeneracional varía a lo largo de la distribución del ingreso laboral de los hijos y de los padres. En general, el efecto del ingreso laboral del padre y de la madre es mayor para los hijos que se encuentran en los cuantiles más bajos. Por otra parte, las elasticidades intergeneracionales del ingreso estimadas en cada cuantil de los hijos, para diferentes tramos de la distribución del ingreso laboral de los padres, son considerablemente distintas. En síntesis, los resultados revelan la existencia de significativas no linealidades en la relación intergeneracional del ingreso laboral.

Suggested Citation

  • Maribel Jiménez, 2011. "Un Análisis Empírico de las No Linealidades en la Movilidad Intergeneracional del Ingreso. El caso de la Argentina," CEDLAS, Working Papers 0114, CEDLAS, Universidad Nacional de La Plata.
  • Handle: RePEc:dls:wpaper:0114
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    1. Kenneth A. Couch & Thomas A. Dunn, 1997. "Intergenerational Correlations in Labor Market Status: A Comparison of the United States and Germany," Journal of Human Resources, University of Wisconsin Press, vol. 32(1), pages 210-232.
    2. Björn Gustafsson, 1994. "The Degree And Pattern Of Income Immobility In Sweden," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 40(1), pages 67-86, March.
    3. Arnaud Lefranc & Alain Trannoy, 2005. "Intergenerational earnings mobility in France: Is France more mobile than the U.S.?," Annals of Economics and Statistics, GENES, issue 78, pages 57-77.
    4. Jere R. Behrman & Alejandro Gaviria & Miguel Székely, 2001. "Intergenerational Mobility in Latin America," ECONOMIA JOURNAL OF THE LATIN AMERICAN AND CARIBBEAN ECONOMIC ASSOCIATION, ECONOMIA JOURNAL OF THE LATIN AMERICAN AND CARIBBEAN ECONOMIC ASSOCIATION, vol. 0(Fall 2001), pages 1-44, August.
    5. Lykke Andersen, 2001. "Social Mobility in Latin America: Links with Adolescent Schooling," Research Department Publications 3130, Inter-American Development Bank, Research Department.
    6. Nicoletti Cheti & Ermisch John F, 2008. "Intergenerational Earnings Mobility: Changes across Cohorts in Britain," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 7(2), pages 1-38, January.
    7. Roland Bénabou & Jean Tirole, 2006. "Belief in a Just World and Redistributive Politics," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 121(2), pages 699-746.
    8. Simona Comi, 2003. "Intergenerational mobility in Europe: evidence from ECHP," Departmental Working Papers 2003-03, Department of Economics, Management and Quantitative Methods at Università degli Studi di Milano.
    9. Bhashkar Mazumder, 2003. "Revised estimates of intergenerational income mobility in the United States," Working Paper Series WP-03-16, Federal Reserve Bank of Chicago.
    10. Miles Corak & Andrew Heisz, 1999. "The Intergenerational Earnings and Income Mobility of Canadian Men: Evidence from Longitudinal Income Tax Data," Journal of Human Resources, University of Wisconsin Press, vol. 34(3), pages 504-533.
    11. Calvin Mudzingiri & Marko Kwaramba, 2016. "Taxes Rates, Economic Crisis and Tax Evasion: Evidence using Zimbabwe and South Africa Bilateral Trade Flows," Working Papers 75, Economic Research Southern Africa.
    12. John Ermisch & Marco Francesconi & Thomas Siedler, 2004. "Intergenerational Economic Mobility and Assortative Mating," Discussion Papers of DIW Berlin 448, DIW Berlin, German Institute for Economic Research.
    13. Blanden, Jo & Goodman, Alissa & Gregg, Paul & Machin, Stephen, 2002. "Changes in intergenerational mobility in Britain," LSE Research Online Documents on Economics 19507, London School of Economics and Political Science, LSE Library.
    14. Couch, Kenneth A. & Lillard, Dean R., 1998. "Sample selection rules and the intergenerational correlation of earnings," Labour Economics, Elsevier, vol. 5(3), pages 313-329, September.
    15. Joshua D. Angrist & Jörn-Steffen Pischke, 2009. "Mostly Harmless Econometrics: An Empiricist's Companion," Economics Books, Princeton University Press, edition 1, number 8769.
    16. Steven Haider & Gary Solon, 2006. "Life-Cycle Variation in the Association between Current and Lifetime Earnings," American Economic Review, American Economic Association, vol. 96(4), pages 1308-1320, September.
    17. Gary S. Becker & Kevin M. Murphy & Robert Tamura, 1994. "Human Capital, Fertility, and Economic Growth," NBER Chapters, in: Human Capital: A Theoretical and Empirical Analysis with Special Reference to Education, Third Edition, pages 323-350, National Bureau of Economic Research, Inc.
    18. Peter Gottschalk & Sheldon Danziger, 1997. "Family Income Mobility -- How Much Is There and Has It Changed?," Boston College Working Papers in Economics 398, Boston College Department of Economics.
    19. Grawe, Nathan D., 2006. "Lifecycle bias in estimates of intergenerational earnings persistence," Labour Economics, Elsevier, vol. 13(5), pages 551-570, October.
    20. Nathan D. Grawe, 2004. "Reconsidering the Use of Nonlinearities in Intergenerational Earnings Mobility as a Test for Credit Constraints," Journal of Human Resources, University of Wisconsin Press, vol. 39(3).
    21. Joshua D. Angrist & Alan B. Krueger, 1993. "Split Sample Instrumental Variables," Working Papers 699, Princeton University, Department of Economics, Industrial Relations Section..
    22. Moshe Buchinsky, 1998. "The dynamics of changes in the female wage distribution in the USA: a quantile regression approach," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 13(1), pages 1-30.
    23. Leigh Andrew, 2007. "Intergenerational Mobility in Australia," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 7(2), pages 1-28, December.
    24. Corak,Miles (ed.), 2004. "Generational Income Mobility in North America and Europe," Cambridge Books, Cambridge University Press, number 9780521827607, September.
    25. Gary Solon, 2002. "Cross-Country Differences in Intergenerational Earnings Mobility," Journal of Economic Perspectives, American Economic Association, vol. 16(3), pages 59-66, Summer.
    26. Murphy, Kevin M & Topel, Robert H, 2002. "Estimation and Inference in Two-Step Econometric Models," Journal of Business & Economic Statistics, American Statistical Association, vol. 20(1), pages 88-97, January.
    27. Atsushi Inoue & Gary Solon, 2010. "Two-Sample Instrumental Variables Estimators," The Review of Economics and Statistics, MIT Press, vol. 92(3), pages 557-561, August.
    28. Milton Friedman, 1957. "A Theory of the Consumption Function," NBER Books, National Bureau of Economic Research, Inc, number frie57-1.
    29. Cheti Nicoletti & Marco Francesconi, 2006. "Intergenerational mobility and sample selection in short panels," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 21(8), pages 1265-1293.
    30. Stephen P. Jenkins & Thomas Siedler, 2007. "The Intergeneratinal Transmission of Poverty in Industrialized Countries," Discussion Papers of DIW Berlin 693, DIW Berlin, German Institute for Economic Research.
    31. Roger Koenker & Kevin F. Hallock, 2001. "Quantile Regression," Journal of Economic Perspectives, American Economic Association, vol. 15(4), pages 143-156, Fall.
    32. Paul Johnson, 2002. "Intergenerational dependence in education and income," Applied Economics Letters, Taylor & Francis Journals, vol. 9(3), pages 159-162.
    33. Eric R. Eide & Mark H. Showalter, 1999. "Factors Affecting the Transmission of Earnings across Generations: A Quantile Regression Approach," Journal of Human Resources, University of Wisconsin Press, vol. 34(2), pages 253-267.
    34. A. B. Atkinson, 1981. "On Intergenerational Income Mobility in Britain," Journal of Post Keynesian Economics, Taylor & Francis Journals, vol. 3(2), pages 194-218, January.
    35. Eva Osterbacka, 2001. "Family Background and Economic Status in Finland," Scandinavian Journal of Economics, Wiley Blackwell, vol. 103(3), pages 467-484, September.
    36. Omar Arias & Walter Sosa-Escudero & Kevin F. Hallock, 2001. "Individual heterogeneity in the returns to schooling: instrumental variables quantile regression using twins data," Empirical Economics, Springer, vol. 26(1), pages 7-40.
    37. Enrique Aldaz Carroll & Ricardo Morán, 2001. "Escaping the Poverty Trap in Latin America: The Role of Family Factors," Latin American Journal of Economics-formerly Cuadernos de Economía, Instituto de Economía. Pontificia Universidad Católica de Chile., vol. 38(114), pages 155-190.
    38. Jere R. Behrman & Alejandro Gaviria & Miguel Székely, 2001. "Intergenerational Mobility in Latin America," Economía Journal, The Latin American and Caribbean Economic Association - LACEA, vol. 0(Fall 2001), pages 1-44, August.
    39. Jere R. Behrman & Paul Taubman, 1990. "The Intergenerational Correlation Between Children'S Adult Earnings And Their Parents' Income: Results From The Michigan Panel Survey Of Income Dynamics," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 36(2), pages 115-127, June.
    40. Hirvonen, Lalaina, 2006. "Intergenerational Earnings Mobility Among Daughters and Sons: Evidence from Sweden and a Comparison with the United States," Working Paper Series 5/2006, Stockholm University, Swedish Institute for Social Research.
    41. Ng, Irene Y.H. & Shen, Xiaoyi & Ho, Kong Weng, 2009. "Intergenerational earnings mobility in Singapore and the United States," Journal of Asian Economics, Elsevier, vol. 20(2), pages 110-119, March.
    42. Heckman, James, 2013. "Sample selection bias as a specification error," Applied Econometrics, Russian Presidential Academy of National Economy and Public Administration (RANEPA), vol. 31(3), pages 129-137.
    43. Piraino Patrizio, 2007. "Comparable Estimates of Intergenerational Income Mobility in Italy," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 7(2), pages 1-27, October.
    44. John E. Roemer & Alain Trannoy, 2013. "Equality of Opportunity," Cowles Foundation Discussion Papers 1921, Cowles Foundation for Research in Economics, Yale University.
    45. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
    46. Dearden, Lorraine & Machin, Stephen & Reed, Howard, 1997. "Intergenerational Mobility in Britain," Economic Journal, Royal Economic Society, vol. 107(440), pages 47-66, January.
    47. Kelly Labart, 2007. "Intergenerational mobility in China," Post-Print hal-00179310, HAL.
    48. repec:bla:revinw:v:46:y:2000:i:4:p:421-36 is not listed on IDEAS
    49. Behrman, Jere & Tarbman, Paul, 1985. "Intergenerational Earnings Mobility in the United States: Some Estimates and a Test of Becker's Intergenerational Endowments Model," The Review of Economics and Statistics, MIT Press, vol. 67(1), pages 144-151, February.
    50. Angrist, Joshua D & Krueger, Alan B, 1995. "Split-Sample Instrumental Variables Estimates of the Return to Schooling," Journal of Business & Economic Statistics, American Statistical Association, vol. 13(2), pages 225-235, April.
    51. Peters, H Elizabeth, 1992. "Patterns of Intergenerational Mobility in Income and Earnings," The Review of Economics and Statistics, MIT Press, vol. 74(3), pages 456-466, August.
    52. Bratberg, Espen & Nilsen, Øivind Anti & Vaage, Kjell, 2005. "Intergenerational Mobility: Trends Across the Earnings Distribution," Working Papers in Economics 04/05, University of Bergen, Department of Economics.
    53. Manuel Arellano & Costas Meghir, 1992. "Female Labour Supply and On-the-Job Search: An Empirical Model Estimated Using Complementary Data Sets," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 59(3), pages 537-559.
    54. Francis Vella, 1998. "Estimating Models with Sample Selection Bias: A Survey," Journal of Human Resources, University of Wisconsin Press, vol. 33(1), pages 127-169.
    55. Gallant, A Ronald & Nychka, Douglas W, 1987. "Semi-nonparametric Maximum Likelihood Estimation," Econometrica, Econometric Society, vol. 55(2), pages 363-390, March.
    56. Anna Christina D'Addio, 2007. "Intergenerational Transmission of Disadvantage: Mobility or Immobility Across Generations?," OECD Social, Employment and Migration Working Papers 52, OECD Publishing.
    57. Alexandra L. Minicozzi, 2003. "Estimation of sons' intergenerational earnings mobility in the presence of censoring," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 18(3), pages 291-314.
    58. Giuseppe De Luca & Franco Peracchi, 2007. "A sample selection model for unit and item nonresponse in cross-sectional surveys," CEIS Research Paper 95, Tor Vergata University, CEIS.
    59. Jacobs,Donald P. & Kalai,Ehud & Kamien,Morton I. & Schwartz,Nancy L. (ed.), 1998. "Frontiers of Research in Economic Theory," Cambridge Books, Cambridge University Press, number 9780521635387, September.
    60. Javier Núñez E. & Leslie Miranda, 2007. "Recent Findings on Intergenerational Income and Educational Mobility in Chile," Working Papers wp244, University of Chile, Department of Economics.
    61. repec:bla:revinw:v:36:y:1990:i:2:p:115-27 is not listed on IDEAS
    62. Arnaud LEFRANC & Fumiaki OJIMA & Takashi YOSHIDA, 2008. "The Intergenerational Transmission of Income and Education: A Comparison of Japan and France," RSCAS Working Papers 2008/25, European University Institute.
    63. Han, Song & Mulligan, Casey B, 2001. "Human Capital, Heterogeneity and Estimated Degrees of Intergenerational Mobility," Economic Journal, Royal Economic Society, vol. 111(470), pages 207-243, April.
    64. Koenker, Roger W & Bassett, Gilbert, Jr, 1978. "Regression Quantiles," Econometrica, Econometric Society, vol. 46(1), pages 33-50, January.
    65. Durlauf,S.N., 2002. "Groups, social influences and inequality : a memberships theory perspective on poverty traps," Working papers 18, Wisconsin Madison - Social Systems.
    66. A.B. Atkinson & F. Bourguignon (ed.), 2000. "Handbook of Income Distribution," Handbook of Income Distribution, Elsevier, edition 1, volume 1, number 1.
    67. repec:bla:scandj:v:103:y:2001:i:3:p:467-84 is not listed on IDEAS
    68. Solon, Gary, 1992. "Intergenerational Income Mobility in the United States," American Economic Review, American Economic Association, vol. 82(3), pages 393-408, June.
    69. Nicoletti, Cheti, 2008. "Multiple sample selection in the estimation of intergenerational occupational mobility," ISER Working Paper Series 2008-20, Institute for Social and Economic Research.
    70. Becker, Gary S & Tomes, Nigel, 1979. "An Equilibrium Theory of the Distribution of Income and Intergenerational Mobility," Journal of Political Economy, University of Chicago Press, vol. 87(6), pages 1153-1189, December.
    71. Zimmerman, David J, 1992. "Regression toward Mediocrity in Economic Stature," American Economic Review, American Economic Association, vol. 82(3), pages 409-429, June.
    72. Vogel, Thorsten, 2006. "Reassessing intergenerational mobility in Germany and the United States: The impact of differences in lifecycle earnings patterns," SFB 649 Discussion Papers 2006-055, Humboldt University Berlin, Collaborative Research Center 649: Economic Risk.
    73. Bjorklund, Anders & Jantti, Markus, 1997. "Intergenerational Income Mobility in Sweden Compared to the United States," American Economic Review, American Economic Association, vol. 87(5), pages 1009-1018, December.
    74. Torun ÖSterberg, 2000. "Intergenerational Income Mobility In Sweden: What Do Tax‐Data Show?," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 46(4), pages 421-436, December.
    75. Lillard, L.A. & Kilburn, M.R., 1995. "Intergenerational Earnings Links: Sons and Daughters," Papers 95-17, RAND - Labor and Population Program.
    76. Kelly LABAR, 2007. "Intergenerational Mobility in China," Working Papers 200729, CERDI.
    77. Dunn Christopher E, 2007. "The Intergenerational Transmission of Lifetime Earnings: Evidence from Brazil," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 7(2), pages 1-42, October.
    78. Dahan, Momi & Gaviria, Alejandro, 2001. "Sibling Correlations and Intergenerational Mobility in Latin America," Economic Development and Cultural Change, University of Chicago Press, vol. 49(3), pages 537-554, April.
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