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Can Biological Factors Like Hepatitis B Explain the Bulk of Gender Imbalance in China? A Review of the Evidence

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  • Monica Das Gupta

Abstract

A recent study challenges the assumption that the large deficit of girls in East and South Asia reflects the preference for sons, suggesting that much of the deficit--as much as 75 percent in China--is attributable to hepatitis B (HBV). The claim is inconsistent with the results of a study based on a large medical data set from Taiwan (China), which indicates that HBV infection raises a woman's probability of having a son by only 0.25 percent. In addition, demographic data from China show that the only group of women who have elevated probabilities of bearing sons are those who have already borne daughters. This pattern makes it difficult to see how any biological factor can explain a large part of the imbalance in China's sex ratios at birth, unless it can be shown that it somehow selectively affects those who have borne girls or causes them to first bear girls and then boys. The Taiwanese example suggests that this is not the case with HBV, the impact of which is unaffected by the sex composition of previous births. The data thus support the cultural rather than the biological explanation for gender imbalance. Copyright The Author 2008. Published by Oxford University Press on behalf of the International Bank for Reconstruction and Development / the world bank . All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org, Oxford University Press.

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  • Monica Das Gupta, 2008. "Can Biological Factors Like Hepatitis B Explain the Bulk of Gender Imbalance in China? A Review of the Evidence," World Bank Research Observer, World Bank Group, vol. 23(2), pages 201-217, May.
  • Handle: RePEc:oup:wbrobs:v:23:y:2008:i:2:p:201-217
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    Cited by:

    1. Amar Hamoudi, 2010. "Exploring the Causal Machinery behind Sex Ratios at Birth: Does Hepatitis B Play a Role?," Economic Development and Cultural Change, University of Chicago Press, vol. 59(1), pages 1-21, October.
    2. World Bank, 2011. "Work and Family : Latin American and Caribbean Women in Search of a New Balance
      [Trabajo & familia : mujeres de América Latina y el Caribe en busca de un nuevo equilibrio - Resumen ejecuivo (Vol. 2
      ," World Bank Other Operational Studies 12489, The World Bank.
    3. Tien Vu, 2014. "One male offspring preference: evidence from Vietnam using a split-population model," Review of Economics of the Household, Springer, vol. 12(4), pages 689-715, December.

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