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Analysis of Professional Trajectories using Disconnected Self-Organizing Maps

Author

Listed:
  • Etienne C^ome

    (IFSTTAR/COSYS/GRETTIA)

  • Marie Cottrell

    (SAMM)

  • Patrice Gaubert

    (ERUDITE)

Abstract

In this paper we address an important economic question. Is there, as mainstream economic theory asserts it, an homogeneous labor market with mechanisms which govern supply and demand for work, producing an equilibrium with its remarkable properties? Using the Panel Study of Income Dynamics (PSID) collected on the period 1984-2003, we study the situations of American workers with respect to employment. The data include all heads of household (men or women) as well as the partners who are on the labor market, working or not. They are extracted from the complete survey and we compute a few relevant features which characterize the worker's situations. To perform this analysis, we suggest using a Self-Organizing Map (SOM, Kohonen algorithm) with specific structure based on planar graphs, with disconnected components (called D-SOM), especially interesting for clustering. We compare the results to those obtained with a classical SOM grid and a star-shaped map (called SOS). Each component of D-SOM takes the form of a string and corresponds to an organized cluster. From this clustering, we study the trajectories of the individuals among the classes by using the transition probability matrices for each period and the corresponding stationary distributions. As a matter of fact, we find clear evidence of heterogeneous parts, each one with high homo-geneity, representing situations well identified in terms of activity and wage levels and in degree of stability in the workplace. These results and their interpretation in economic terms contribute to the debate about flexibility which is commonly seen as a way to obtain a better level of equilibrium on the labor market.

Suggested Citation

  • Etienne C^ome & Marie Cottrell & Patrice Gaubert, 2015. "Analysis of Professional Trajectories using Disconnected Self-Organizing Maps," Papers 1507.00578, arXiv.org.
  • Handle: RePEc:arx:papers:1507.00578
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    References listed on IDEAS

    as
    1. Eichhorst, Werner & Tobsch, Verena, 2013. "Has Atypical Work Become Typical in Germany?," IZA Discussion Papers 7609, Institute for the Study of Labor (IZA).
    2. Forni, Mario & Hallin, Marc & Lippi, Marco & Reichlin, Lucrezia, 2004. "The generalized dynamic factor model consistency and rates," Journal of Econometrics, Elsevier, vol. 119(2), pages 231-255, April.
    3. Werner Eichhorst & Verena Tobsch, 2013. "Has Atypical Work Become Typical in Germany?: Country Case Studies on Labour Market Segmentation," SOEPpapers on Multidisciplinary Panel Data Research 596, DIW Berlin, The German Socio-Economic Panel (SOEP).
    4. repec:ilo:ilowps:481496 is not listed on IDEAS
    5. Danthine, Samuel, 2005. "Two-Sided Search, Heterogeneous Skills and Labor Market Performance," IZA Discussion Papers 1572, Institute for the Study of Labor (IZA).
    6. Florent Fremigacci & Yannick L’Horty, 2005. "La qualité de l’emploi en France : tendance et cycle," Documents de recherche 05-19, Centre d'Études des Politiques Économiques (EPEE), Université d'Evry Val d'Essonne.
    7. Lucie Davoine & Christine Erhel, 2012. "La qualité de l'emploi," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) hal-00858317, HAL.
    8. Bartolucci, Francesco & Farcomeni, Alessio, 2009. "A Multivariate Extension of the Dynamic Logit Model for Longitudinal Data Based on a Latent Markov Heterogeneity Structure," Journal of the American Statistical Association, American Statistical Association, vol. 104(486), pages 816-831.
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