Brains or beauty? Causal evidence on the returns to education and attractiveness in the online dating market
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DOI: 10.1016/j.jpubeco.2021.104372
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- Miriam Bruhn & David McKenzie, 2009.
"In Pursuit of Balance: Randomization in Practice in Development Field Experiments,"
American Economic Journal: Applied Economics, American Economic Association, vol. 1(4), pages 200-232, October.
- Bruhn, Miriam & McKenzie, David, 2008. "In pursuit of balance : randomization in practice in development field experiments," Policy Research Working Paper Series 4752, The World Bank.
- Eugene Choo & Aloysius Siow, 2006. "Who Marries Whom and Why," Journal of Political Economy, University of Chicago Press, vol. 114(1), pages 175-201, February.
- Michèle Belot & Marco Francesconi, 2013.
"Dating Preferences and Meeting Opportunities in Mate Choice Decisions,"
Journal of Human Resources, University of Wisconsin Press, vol. 48(2), pages 474-508.
- Francesconi, M & Belot, M, 2011. "Dating Preferences and Meeting Opportunities in Mate Choice Decisions," Economics Discussion Papers 2574, University of Essex, Department of Economics.
- Hamermesh, Daniel S & Biddle, Jeff E, 1994.
"Beauty and the Labor Market,"
American Economic Review, American Economic Association, vol. 84(5), pages 1174-1194, December.
- Daniel S. Hamermesh & Jeff E. Biddle, 1993. "Beauty and the Labor Market," NBER Working Papers 4518, National Bureau of Economic Research, Inc.
- Browning,Martin & Chiappori,Pierre-André & Weiss,Yoram, 2014. "Economics of the Family," Cambridge Books, Cambridge University Press, number 9780521791595.
- Linda Y. Wong, 2003.
"Structural Estimation of Marriage Models,"
Journal of Labor Economics, University of Chicago Press, vol. 21(3), pages 699-728, July.
- Wong, Linda, 2001. "Structural Estimation of Marriage Models," 10th International Conference on Panel Data, Berlin, July 5-6, 2002 A1-1, International Conferences on Panel Data.
- Linda Y. Wong, 2001. "Structural Estimation of Marriage Models," Computing in Economics and Finance 2001 222, Society for Computational Economics.
- Olle Folke & Johanna Rickne, 2020.
"All the Single Ladies: Job Promotions and the Durability of Marriage,"
American Economic Journal: Applied Economics, American Economic Association, vol. 12(1), pages 260-287, January.
- Folke, Olle & Rickne, Johanna, 2016. "All the Single Ladies: Job Promotions and the Durability of Marriage," Working Paper Series 1146, Research Institute of Industrial Economics.
- Raquel Fernández & Nezih Guner & John Knowles, 2005.
"Love and Money: A Theoretical and Empirical Analysis of Household Sorting and Inequality,"
The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 120(1), pages 273-344.
- Raquel Fernandez & Nezih Guner & John Knowles, 2001. "Love and Money: A Theoretical and Empirical Analysis of Household Sorting and Inequality," NBER Working Papers 8580, National Bureau of Economic Research, Inc.
- Fernández, Raquel & Guner, Nezih & Knowles, John, 2001. "Love and Money: A Theoretical and Empirical Analysis of Household Sorting and Inequality," CEPR Discussion Papers 3040, C.E.P.R. Discussion Papers.
- Raquel Fernandez & John Knowles & Nezih Guner, 2001. "Love and Money: A Theoretical and Empirical Analysis of Household Sorting and Inequality," LIS Working papers 283, LIS Cross-National Data Center in Luxembourg.
- Raquel Ferndez & Nezih Guner & John Knowles, 2001. "Love and Money: A Theoretical and Empirical Analysis of Household Sorting and Inequality," Penn CARESS Working Papers d3d043317c8e26c4039c21aa0, Penn Economics Department.
- Gary S. Becker, 1981. "A Treatise on the Family," NBER Books, National Bureau of Economic Research, Inc, number beck81-1.
- Browning,Martin & Chiappori,Pierre-André & Weiss,Yoram, 2014. "Economics of the Family," Cambridge Books, Cambridge University Press, number 9780521795395.
- Gul, Faruk, 1991. "A Theory of Disappointment Aversion," Econometrica, Econometric Society, vol. 59(3), pages 667-686, May.
- Jennifer L. Doleac & Luke C.D. Stein, 2013.
"The Visible Hand: Race and Online Market Outcomes,"
Economic Journal, Royal Economic Society, vol. 123(11), pages 469-492, November.
- Jennifer L. Doleac & Luke C.D. Stein, 2010. "The Visible Hand: Race and Online Market Outcomes," Discussion Papers 09-015, Stanford Institute for Economic Policy Research.
- Jennifer L. Doleac & Luke C.D. Stein, 2011. "The Visible Hand: Race and Online Market Outcomes," Discussion Papers 10-025, Stanford Institute for Economic Policy Research.
- Lasse Eika & Magne Mogstad & Basit Zafar, 2019.
"Educational Assortative Mating and Household Income Inequality,"
Journal of Political Economy, University of Chicago Press, vol. 127(6), pages 2795-2835.
- Lasse Eika & Magne Mogstad & Basit Zafar, 2014. "Educational Assortative Mating and Household Income Inequality," NBER Working Papers 20271, National Bureau of Economic Research, Inc.
- Lasse Eika & Magne Mogstad & Basit Zafar, 2014. "Educational assortative mating and household income inequality," Staff Reports 682, Federal Reserve Bank of New York.
- Alberto Bisin & Giorgio Topa & Thierry Verdier, 2004. "Religious Intermarriage and Socialization in the United States," Journal of Political Economy, University of Chicago Press, vol. 112(3), pages 615-664, June.
- Ravi Bapna & Jui Ramaprasad & Galit Shmueli & Akhmed Umyarov, 2016. "One-Way Mirrors in Online Dating: A Randomized Field Experiment," Management Science, INFORMS, vol. 62(11), pages 3100-3122, November.
- Roland G. Fryer & Steven D. Levitt, 2004.
"The Causes and Consequences of Distinctively Black Names,"
The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 119(3), pages 767-805.
- Roland G. Fryer & Steven D. Levitt, 2003. "The Causes and Consequences of Distinctively Black Names," NBER Working Papers 9938, National Bureau of Economic Research, Inc.
- Pierre-André Chiappori & Sonia Oreffice & Climent Quintana-Domeque, 2012.
"Fatter Attraction: Anthropometric and Socioeconomic Matching on the Marriage Market,"
Journal of Political Economy, University of Chicago Press, vol. 120(4), pages 659-695.
- Pierre Chiapore & Climent Quintana Domeque & Sonia Oreffice, 2010. "Fatter attraction: anthropometric and socieconomic matching on the marriage market," Working Papers. Serie AD 2010-23, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
- Pierre-André Chiappori & Sonia Oreffice & Climent Quintana-Domeque, 2010. "Fatter Attraction: Anthropometric and Socioeconomic Matching on the Marriage Market," Working Papers 2011-012, Human Capital and Economic Opportunity Working Group.
- Marianne Bitler & Lucie Schmidt, 2012.
"Utilization of Infertility Treatments: The Effects of Insurance Mandates,"
Demography, Springer;Population Association of America (PAA), vol. 49(1), pages 125-149, February.
- Marianne Bitler & Lucie Schmidt, 2008. "Utilization of Infertility Treatments: The Effects of Insurance Mandates," Department of Economics Working Papers 2008-05, Department of Economics, Williams College.
- Marianne P. Bitler & Lucie Schmidt, 2011. "Utilization of Infertility Treatments: The Effects of Insurance Mandates," NBER Working Papers 17668, National Bureau of Economic Research, Inc.
- Christine Schwartz & Robert Mare, 2005. "Trends in educational assortative marriage from 1940 to 2003," Demography, Springer;Population Association of America (PAA), vol. 42(4), pages 621-646, November.
- Marianne Bertrand & Emir Kamenica & Jessica Pan, 2015.
"Gender Identity and Relative Income within Households,"
The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 130(2), pages 571-614.
- Marianne Bertrand & Jessica Pan & Emir Kamenica, 2013. "Gender Identity and Relative Income within Households," NBER Working Papers 19023, National Bureau of Economic Research, Inc.
- Bertrand, Marianne & Kamenica, Emir & Pan, Jessica, 2015. "Gender Identity and Relative Income Within Households," CEPR Discussion Papers 10443, C.E.P.R. Discussion Papers.
- Gautier, Pieter A. & Svarer, Michael & Teulings, Coen N., 2010. "Marriage and the city: Search frictions and sorting of singles," Journal of Urban Economics, Elsevier, vol. 67(2), pages 206-218, March.
- David C Phillips, 2019. "Do Comparisons of Fictional Applicants Measure Discrimination When Search Externalities are Present? Evidence from Existing Experiments," The Economic Journal, Royal Economic Society, vol. 129(621), pages 2240-2264.
- Gunter J. Hitsch & Ali Hortaçsu & Dan Ariely, 2010. "Matching and Sorting in Online Dating," American Economic Review, American Economic Association, vol. 100(1), pages 130-163, March.
- Marianne Bertrand & Sendhil Mullainathan, 2004.
"Are Emily and Greg More Employable Than Lakisha and Jamal? A Field Experiment on Labor Market Discrimination,"
American Economic Review, American Economic Association, vol. 94(4), pages 991-1013, September.
- Marianne Bertrand & Sendhil Mullainathan, 2003. "Are emily and greg more employable than lakisha and jamal? A field experiment on labor market discrimination," Natural Field Experiments 00216, The Field Experiments Website.
- Marianne Bertrand & Sendhil Mullainathan, 2003. "Are Emily and Greg More Employable than Lakisha and Jamal? A Field Experiment on Labor Market Discrimination," NBER Working Papers 9873, National Bureau of Economic Research, Inc.
- Ahmed, Ali M. & Hammarstedt, Mats, 2008. "Discrimination in the rental housing market: A field experiment on the Internet," Journal of Urban Economics, Elsevier, vol. 64(2), pages 362-372, September.
- David E. Bell, 1985. "Disappointment in Decision Making Under Uncertainty," Operations Research, INFORMS, vol. 33(1), pages 1-27, February.
- Petter Lundborg & Erik Plug & Astrid Würtz Rasmussen, 2017.
"Can Women Have Children and a Career? IV Evidence from IVF Treatments,"
American Economic Review, American Economic Association, vol. 107(6), pages 1611-1637, June.
- Lundborg, Petter & Plug, Erik & Würtz Rasmussen, Astrid, 2018. "Can Women Have Children and a Career? IV Evidence from IVF Treatments," Working Paper Series 2018:2, IFAU - Institute for Evaluation of Labour Market and Education Policy.
- Robert Andersen & Tina Fetner, 2008. "Economic Inequality and Intolerance: Attitudes toward Homosexuality in 35 Democracies," American Journal of Political Science, John Wiley & Sons, vol. 52(4), pages 942-958, October.
- Ong, David & Wang, Jue, 2015. "Income attraction: An online dating field experiment," Journal of Economic Behavior & Organization, Elsevier, vol. 111(C), pages 13-22.
- Raymond Fisman & Sheena S. Iyengar & Emir Kamenica & Itamar Simonson, 2006. "Gender Differences in Mate Selection: Evidence From a Speed Dating Experiment," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 121(2), pages 673-697.
- David Glowsky, 2007. "Why Do German Men Marry Women from Less Developed Countries?: An Analysis of Transnational Partner Search Based on the German Socio-Economic Panel," SOEPpapers on Multidisciplinary Panel Data Research 61, DIW Berlin, The German Socio-Economic Panel (SOEP).
- Graham Loomes & Robert Sugden, 1986. "Disappointment and Dynamic Consistency in Choice under Uncertainty," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 53(2), pages 271-282.
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- Hanna Virtanen & Mikko Silliman & Tiina Kuuppelomäki & Kristiina Huttunen, 2024. "Education, Gender, and Family Formation," CESifo Working Paper Series 11182, CESifo.
- Virtanen, Hanna & Silliman, Mikko & Kuuppelomäki, Tiina & Huttunen, Kristiina, 2024. "Education, Gender, and Family Formation," ETLA Working Papers 116, The Research Institute of the Finnish Economy.
- Virtanen, Hanna & Silliman, Mikko & Kuuppelomäki, Tiina & Huttunen, Kristiina, 2024. "Education, Gender, and Family Formation," IZA Discussion Papers 17122, Institute of Labor Economics (IZA).
- Quentin Lippmann & Khushboo Surana, 2022. "The Hierarchy of Partner Preferences," Discussion Papers 22/08, Department of Economics, University of York.
- Beloborodova, Anna, 2023. "Political views regarding the war in Ukraine in an online dating experiment," MPRA Paper 120739, University Library of Munich, Germany.
- Beloborodova, Anna, 2023. "Love or politics? Political views regarding the war in Ukraine in an online dating experiment," MPRA Paper 118862, University Library of Munich, Germany.
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Keywords
Partner preferences; Partner matches; Beauty; Education; Field study; Randomized experiment; Online dating;All these keywords.
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