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How Urbanization Affect Employment and Social Interactions

  • Yasuhiro Sato


    (Graduate School of Economics, Osaka University)

  • Yves Zenou


    (Research Institute of Industrial Economics (IFN), Stockholm University)

We develop a model where unemployed workers in the city can find a job either directly or through weak or strong ties. We show that, in denser areas, individuals choose to interact with more people and meet more random encounters (weak ties) than in sparsely populated areas. We also demonstrate that, for a low urbanization level, there is a unique steady-state equilibrium where workers do not interact with weak ties, while, for a high level of urbanization, there is a unique steady-state equilibrium with full social interactions. We show that these equilibria are usually not socially efficient when the urban population has an intermediate size because there are too few social interactions compared to the social optimum. Finally, even when social interactions are optimal, we show that there is over-urbanization in equilibrium.

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Paper provided by Osaka University, Graduate School of Economics and Osaka School of International Public Policy (OSIPP) in its series Discussion Papers in Economics and Business with number 13-32.

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Length: 43 pages
Date of creation: Dec 2013
Date of revision:
Handle: RePEc:osk:wpaper:1332
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  1. Patrick Bayer & Stephen L. Ross, 2004. "Place of Work and Place of Residence: Informal Hiring Networks and Labor Market Outcomes," Econometric Society 2004 North American Summer Meetings 495, Econometric Society.
  2. Topa, Giorgio & Zenou, Yves, 2015. "Neighborhood and Network Effects," Handbook of Regional and Urban Economics, Elsevier.
  3. R. Jason Faberman, 2005. "What’s In a City?: Understanding the Micro-Level Employer Dynamics Underlying Urban Growth," Working Papers 386, U.S. Bureau of Labor Statistics.
  4. Calvó-Armengol, Antoni & Patacchini, Eleonora & Zenou, Yves, 2008. "Peer Effects and Social Networks in Education," IZA Discussion Papers 3859, Institute for the Study of Labor (IZA).
  5. Sebastian Grauwin & Florence Goffette-Nagot & Pablo Jensen, 2010. "Dynamic models of residential segregation : an analytical solution," Working Papers 1017, Groupe d'Analyse et de Théorie Economique (GATE), Centre national de la recherche scientifique (CNRS), Université Lyon 2, Ecole Normale Supérieure.
  6. Topa, Giorgio, 1997. "Social Interactions, Local Spillovers and Unemployment," Working Papers 97-17, C.V. Starr Center for Applied Economics, New York University.
  7. Zenou, Yves, 2010. "Search, Migration, and Urban Land Use: The Case of Transportation Policies," Research Papers in Economics 2010:19, Stockholm University, Department of Economics.
  8. Brueckner, Jan & Thisse, Jacques-François & Zenou, Yves, 2000. "Local Labour Markets, Job Matching and Urban Location," CEPR Discussion Papers 2612, C.E.P.R. Discussion Papers.
  9. Christopher A. Pissarides, 2000. "Equilibrium Unemployment Theory, 2nd Edition," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262161877, December.
  10. Yannis M. Ioannides, 2010. "Neighborhood Effects and Housing," Discussion Papers Series, Department of Economics, Tufts University 0747, Department of Economics, Tufts University.
  11. Robert W. Helsley & William C. Strange, 2007. "Urban interactions and spatial structure," Journal of Economic Geography, Oxford University Press, vol. 7(2), pages 119-138, March.
  12. Brueckner, Jan K. & Largey, Ann G., 2008. "Social interaction and urban sprawl," Journal of Urban Economics, Elsevier, vol. 64(1), pages 18-34, July.
  13. Helsley, Robert & Zenou, Yves, 2011. "Social Networks and Interactions in Cities," Research Papers in Economics 2011:8, Stockholm University, Department of Economics.
  14. Antonio Ciccone & Robert E. Hall, 1995. "Productivity and the density of economic activity," Economics Working Papers 120, Department of Economics and Business, Universitat Pompeu Fabra.
  15. Combes, Pierre-Philippe & Gobillon, Laurent, 2014. "The Empirics of Agglomeration Economies," IZA Discussion Papers 8508, Institute for the Study of Labor (IZA).
  16. MOSSAY, Pascal & PICARD, Pierre M., . "On spatial equilibria in a social interaction model," CORE Discussion Papers RP 2436, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  17. Yannis M. Ioannides & Linda Datcher Loury, 2004. "Job Information Networks, Neighborhood Effects, and Inequality," Journal of Economic Literature, American Economic Association, vol. 42(4), pages 1056-1093, December.
  18. Douglas Marcouiller, S.J. & Veronica Ruiz de Castilla & Christopher Woodruff, 1995. "Formal Measures of the Informal Sector Wage Gap in Mexico, El Salvador, and Peru," Boston College Working Papers in Economics 294., Boston College Department of Economics.
  19. Ghiglino, Christian & Nocco, Christian, 2012. "When Veblen meets Krugman," Economics Discussion Papers 8949, University of Essex, Department of Economics.
  20. Wahba, Jackline & Zenou, Yves, 2004. "Density, Social Networks and Job Search Methods: Theory and Application to Egypt," Working Paper Series 629, Research Institute of Industrial Economics.
  21. Cattell, Vicky, 2001. "Poor people, poor places, and poor health: the mediating role of social networks and social capital," Social Science & Medicine, Elsevier, vol. 52(10), pages 1501-1516, May.
  22. Judith K. Hellerstein & Melissa P. McInerney & David Neumark, 2010. "Neighbors And Co-Workers:The Importance Of Residential Labor Market Networks," Working Papers 101, Department of Economics, College of William and Mary.
  23. Zenou, Yves, 2013. "Spatial versus social mismatch," Journal of Urban Economics, Elsevier, vol. 74(C), pages 113-132.
  24. Edward L. Glaeser & Bruce Sacerdote & José A. Scheinkman, 1996. "Crime and Social Interactions," The Quarterly Journal of Economics, Oxford University Press, vol. 111(2), pages 507-548.
  25. Antoni Calvó-Armengol & Matthew O. Jackson, 2004. "The Effects of Social Networks on Employment and Inequality," American Economic Review, American Economic Association, vol. 94(3), pages 426-454, June.
  26. Marshall, Alfred, 1890. "The Principles of Economics," History of Economic Thought Books, McMaster University Archive for the History of Economic Thought, number marshall1890.
  27. Calvó-Armengol, Antoni & Verdier, Thierry & Zenou, Yves, 2006. "Strong and Weak Ties in Employment and Crime," CEPR Discussion Papers 5448, C.E.P.R. Discussion Papers.
  28. Edward L. Glaeser, 2010. "Introduction to "Agglomeration Economics"," NBER Chapters, in: Agglomeration Economics, pages 1-14 National Bureau of Economic Research, Inc.
  29. repec:esx:essedp:708 is not listed on IDEAS
  30. Patacchini, Eleonora & Zenou, Yves, 2012. "Ethnic networks and employment outcomes," Regional Science and Urban Economics, Elsevier, vol. 42(6), pages 938-949.
  31. Rosenthal, Stuart S. & Strange, William C., 2004. "Evidence on the nature and sources of agglomeration economies," Handbook of Regional and Urban Economics, in: J. V. Henderson & J. F. Thisse (ed.), Handbook of Regional and Urban Economics, edition 1, volume 4, chapter 49, pages 2119-2171 Elsevier.
  32. Yannis M. Ioannides & Giorgio Topa, 2009. "Neighborhood Effects: Accomplishments and Looking Beyond Them," Discussion Papers Series, Department of Economics, Tufts University 0736, Department of Economics, Tufts University.
  33. Harris, John R & Todaro, Michael P, 1970. "Migration, Unemployment & Development: A Two-Sector Analysis," American Economic Review, American Economic Association, vol. 60(1), pages 126-42, March.
  34. Yamada, Gustavo, 1996. "Urban Informal Employment and Self-Employment in Developing Countries: Theory and Evidence," Economic Development and Cultural Change, University of Chicago Press, vol. 44(2), pages 289-314, January.
  35. George A. Akerlof, 1997. "Social Distance and Social Decisions," Econometrica, Econometric Society, vol. 65(5), pages 1005-1028, September.
  36. Pascal MOSSAY & Pierre PICARD, 2013. "Spatial Segregation and Urban Structure," Discussion papers 13056, Research Institute of Economy, Trade and Industry (RIETI).
  37. Zhang, Junfu, 2004. "Residential segregation in an all-integrationist world," Journal of Economic Behavior & Organization, Elsevier, vol. 54(4), pages 533-550, August.
  38. Maloney, William F, 1999. "Does Informality Imply Segmentation in Urban Labor Markets? Evidence from Sectoral Transitions in Mexico," World Bank Economic Review, World Bank Group, vol. 13(2), pages 275-302, May.
  39. Yannis M. Ioannides, 2012. "From Neighborhoods to Nations: The Economics of Social Interactions," Economics Books, Princeton University Press, edition 1, number 9892, 01-2013.
  40. Edward L. Glaeser, 2010. "Agglomeration Economics," NBER Books, National Bureau of Economic Research, Inc, number glae08-1, September.
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