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Selbstproduktivität in der frühen Kindheit: eine empirische Analyse mit Berücksichtigung von Geschwistereffekten


  • Katja Coneus


Self-productivity is a crucial feature in the process of skill formation. It means that skills developed in previous stages enhance the development of skills during later stages. This paper presents an empirical investigation of self-productivity in early childhood in Germany. The data are drawn from the mother-child questionnaire of the German Socio-Economic Panel for the birth cohorts 2002-2008. We exploit the variation of skills between siblings within one family to identify self-productivity effects for the first three years of a child's life. Our results support the meaning of this feature directly after birth. The magnitude of self-productivity varies between skills and stages. These results emphasize the efficiency of early childhood investments against investments later in life. Selbstproduktivität ist eine zentrale Eigenschaft für die Entwicklung von Fähigkeiten. Sie besagt, dass der Erwerb weiterer Fähigkeiten positiv vom bereits erreichten Fähigkeitsniveau abhängt. Auf Grundlage des Sozio-oekonomischen Panels (SOEP) untersucht diese empirische Analyse für Deutschland Selbstproduktivitätseffekte innerhalb der ersten drei Lebensjahre. Die Identifikation der Selbstproduktivitätseffekte resultiert aus der Ausnutzung der Variationen der Fähigkeiten zwischen den Geschwistern innerhalb einer Familie. Die Ergebnisse der Studie verdeutlichen die empirische Relevanz dieser Eigenschaft ab der Geburt. Es zeigt sich, dass Selbstproduktivitätseffekte sowohl zwischen den beobachteten Fähigkeiten als auch über die Zeit variieren. Diese Ergebnisse betonen die Produktivität frühkindlicher Bildungsanstrengungen gegenüber späteren Investitionen.

Suggested Citation

  • Katja Coneus, 2010. "Selbstproduktivität in der frühen Kindheit: eine empirische Analyse mit Berücksichtigung von Geschwistereffekten," Vierteljahrshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, DIW Berlin, German Institute for Economic Research, vol. 79(3), pages 45-55.
  • Handle: RePEc:diw:diwvjh:79-3-4

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    References listed on IDEAS

    1. Flavio Cunha & James J. Heckman, 2009. "The Economics and Psychology of Inequality and Human DEvelopment," Journal of the European Economic Association, MIT Press, vol. 7(2-3), pages 320-364, 04-05.
    2. Flavio Cunha & James J. Heckman & Susanne M. Schennach, 2010. "Estimating the Technology of Cognitive and Noncognitive Skill Formation," Econometrica, Econometric Society, vol. 78(3), pages 883-931, May.
    3. Blomeyer, Dorothea & Coneus, Katja & Laucht, Manfred & Pfeiffer, Friedhelm, 2008. "Self-Productivity and Complementarities in Human Development: Evidence from the Mannheim Study of Children at Risk," IZA Discussion Papers 3734, Institute for the Study of Labor (IZA).
    4. Philip Oreopoulos & Mark Stabile & Randy Walld & Leslie L. Roos, 2008. "Short-, Medium-, and Long-Term Consequences of Poor Infant Health: An Analysis Using Siblings and Twins," Journal of Human Resources, University of Wisconsin Press, vol. 43(1).
    5. Douglas Almond & Kenneth Y. Chay & David S. Lee, 2005. "The Costs of Low Birth Weight," The Quarterly Journal of Economics, Oxford University Press, vol. 120(3), pages 1031-1083.
    6. Cunha, Flavio & Heckman, James J. & Lochner, Lance, 2006. "Interpreting the Evidence on Life Cycle Skill Formation," Handbook of the Economics of Education, Elsevier.
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    More about this item


    Self-productivity; early childhood; skills; birth weight;

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I21 - Health, Education, and Welfare - - Education - - - Analysis of Education
    • J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth


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