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A Search Model with a Quasi-Network

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  • Jo�o Miguel Ejarque

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    Abstract

    In a standard search model the expected duration of unemployment is independent of the duration of previous employment, as well as of the current length of the unemployment spell. This paper offers a network mechanism to generate these correlations. Here, employed workers invest in social contacts with other employed workers, which will help them find jobs in the event of unemployment. These social contacts "depreciate" because they can also become unemployed and unemployed contacts are assumed to be useless. In this model the longer you have been working, the more contacts you are likely to have, and the more contacts you have the shorter your expected unemployment duration will be. The model is a simple and tractable way of introducing network ideas in one of the workhorses of labour and macroeconomics. The model also suggests that networks are less productive during periods of high unemployment, mainly because high unemployment destroys part of the network. In addition, the model provides guidance for indirect inference of network effects from the data.

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    Bibliographic Info

    Paper provided by University of Essex, Department of Economics in its series Economics Discussion Papers with number 665.

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    Date of creation: 17 Feb 2009
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    Handle: RePEc:esx:essedp:665

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    1. Krause, Michael U. & Lubik, Thomas A., 2006. "The cyclical upgrading of labor and on-the-job search," Labour Economics, Elsevier, vol. 13(4), pages 459-477, August.
    2. Renato Faccini & Salvador Ortigueira, 2008. "Labor-Market Volatility in the Search-and-Matching Model: The Role of Investment-Specific Technology Shocks," Economics Working Papers ECO2008/39, European University Institute.
    3. Dale T. Mortensen & Christopher A. Pissarides, 1993. "Job Creation and Job Destruction in the Theory of Unemployment," CEP Discussion Papers dp0110, Centre for Economic Performance, LSE.
    4. Larsen, Birthe, 2001. "Minimum wages, technological progress and loss of skill," European Economic Review, Elsevier, vol. 45(8), pages 1521-1544, August.
    5. Montgomery, James D, 1991. "Social Networks and Labor-Market Outcomes: Toward an Economic Analysis," American Economic Review, American Economic Association, vol. 81(5), pages 1407-18, December.
    6. Calvo-Armengol, Antoni & Jackson, Matthew O., 2007. "Networks in labor markets: Wage and employment dynamics and inequality," Journal of Economic Theory, Elsevier, vol. 132(1), pages 27-46, January.
    7. Mortensen, Dale T. & Nagypál, Éva, 2005. "More on Unemployment and Vacancy Fluctuations," IZA Discussion Papers 1765, Institute for the Study of Labor (IZA).
    8. Christopher A. Pissarides & Barbara Petrongolo, 2001. "Looking into the Black Box: A Survey of the Matching Function," Journal of Economic Literature, American Economic Association, vol. 39(2), pages 390-431, June.
    9. Marcus Hagedorn & Iourii Manovskii, 2008. "The Cyclical Behavior of Equilibrium Unemployment and Vacancies Revisited," American Economic Review, American Economic Association, vol. 98(4), pages 1692-1706, September.
    10. Lynch, Lisa M, 1989. "The Youth Labor Market in the Eighties: Determinants of Re-employment Probabilities for Young Men and Women," The Review of Economics and Statistics, MIT Press, vol. 71(1), pages 37-45, February.
    11. Pissarides, Christopher A, 1992. "Loss of Skill during Unemployment and the Persistence of Employment Shocks," The Quarterly Journal of Economics, MIT Press, vol. 107(4), pages 1371-91, November.
    12. Addison, John T & Portugal, Pedro, 1989. "Job Displacement, Relative Wage Changes, and Duration of Unemployment," Journal of Labor Economics, University of Chicago Press, vol. 7(3), pages 281-302, July.
    13. Russell Cooper & John Haltiwanger & Jonathan L. Willis, 2007. "Implications of Search Frictions: Matching Aggregate and Establishment-level Observations," NBER Working Papers 13115, National Bureau of Economic Research, Inc.
    14. Simon Burgess & Helene Turon, 2005. "The Cyclical Behavior of Equilibrium Unemployment and Vacancies – A Comment," Bristol Economics Discussion Papers 05/573, Department of Economics, University of Bristol, UK.
    15. Robert Shimer, 2005. "The Cyclical Behavior of Equilibrium Unemployment and Vacancies," American Economic Review, American Economic Association, vol. 95(1), pages 25-49, March.
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