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The Irish Economy » Blog Archive » The Irish “Masculinity Ratio”: "The current issue of The Economist has a leader on the growing imbalance between males and females in birth cohorts in China and India and some other countries. The sex ratio at birth, or “masculinity ratio”, is normally about 1.05. Amartya Sen and Ansley Coale drew attention to the high ratios emerging in China and India some twenty years ago. The ratio has continued to rise in these countries and has now reached 1.30 in some Chinese provinces."