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Economic stress or random variation? Revisiting german reunification as a natural experiment to investigate the effect of economic contraction on sex ratios at birth

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  • Sebastian Schnettler

    (Max Planck Institute for Demographic Research, Rostock, Germany)

  • Sebastian Klüsener

    (Max Planck Institute for Demographic Research, Rostock, Germany)

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    Abstract

    The economic stress hypothesis (ESH) suggests that economic decline leads to a decrease in the proportion of males born in a population. A multitude of additional influences on sex ratios that often cannot be accounted for empirically make assessing the validity of the ESH difficult. Thus, as a historical quasi-experiment, German reunification constitutes an interesting test case. The economy in East Germany, but not in West Germany, underwent a rapid decline in 1991. In the same year, the sex ratio decreased in East Germany, but not in West Germany. Catalano (2003) interpreted these developments as evidence in support of the ESH. Using more recent and detailed data, we re-examine this case to test an alternative explanation, the random variation hypothesis (RVH). Using aggregate data on sex ratios between 1946-2010 and individual-level data on over 13 million births from the German Birth Registry between 1991-2009, we find evidence supporting the RVH but not the ESH. First, the sex ratio in East Germany shows stronger deviations from the time trend in several years, and is seemingly unrelated to economic developments. The degree of variation is associated with the smaller and decreasing number of births in East Germany during the fertility decline following reunification. The individual-level analysis confirms that the 1991 decrease in the East German sex ratio could also be the result of random variation. A specificity of the East German transformation is the buffering of the consequences of economic decline through integration into the West German welfare state. Therefore, the ESH may be applicable in other transformation cases.

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    File URL: http://www.demogr.mpg.de/papers/working/wp-2013-005.pdf
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    Bibliographic Info

    Paper provided by Max Planck Institute for Demographic Research, Rostock, Germany in its series MPIDR Working Papers with number WP-2013-005.

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    Length: 27 pages
    Date of creation: Apr 2013
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    Handle: RePEc:dem:wpaper:wp-2013-005

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    Web page: http://www.demogr.mpg.de/

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    Keywords: Germany; Germany (Alte Bundesländer); Germany (Neue Bundesländer); economic recession; sex ratio;

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    1. Douglas Almond & Janet Currie, 2011. "Killing Me Softly: The Fetal Origins Hypothesis," Journal of Economic Perspectives, American Economic Association, vol. 25(3), pages 153-72, Summer.
    2. Douglas Almond & Bhashkar Mazumder, 2011. "Health Capital and the Prenatal Environment: The Effect of Ramadan Observance during Pregnancy," American Economic Journal: Applied Economics, American Economic Association, vol. 3(4), pages 56-85, October.
    3. Christoph F. Büchtemann & Jürgen Schupp, 1992. "Repercussions of Reunification: Patterns and Trends in the Socio-Economic Transformation of East Germany," Discussion Papers of DIW Berlin 44, DIW Berlin, German Institute for Economic Research.
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