March 9, 2010

THUS DIES ANOTHER LIE WE USED TO COMFORT OURSELVES (via John Thacker):

Gendercide: The worldwide war on baby girls: Technology, declining fertility and ancient prejudice are combining to unbalance societies (The Economist, 5/04/10)

Boys are slightly more likely to die in infancy than girls. To compensate, more boys are born than girls so there will be equal numbers of young men and women at puberty. In all societies that record births, between 103 and 106 boys are normally born for every 100 girls. The ratio has been so stable over time that it appears to be the natural order of things.

That order has changed fundamentally in the past 25 years. In China the sex ratio for the generation born between 1985 and 1989 was 108, already just outside the natural range. For the generation born in 2000-04, it was 124 (ie, 124 boys were born in those years for every 100 girls). According to CASS the ratio today is 123 boys per 100 girls. These rates are biologically impossible without human intervention.

The national averages hide astonishing figures at the provincial level. According to an analysis of Chinese household data carried out in late 2005 and reported in the British Medical Journal*, only one region, Tibet, has a sex ratio within the bounds of nature. Fourteen provinces—mostly in the east and south—have sex ratios at birth of 120 and above, and three have unprecedented levels of more than 130. As CASS says, “the gender imbalance has been growing wider year after year.”

The BMJ study also casts light on one of the puzzles about China’s sexual imbalance. How far has it been exaggerated by the presumed practice of not reporting the birth of baby daughters in the hope of getting another shot at bearing a son? Not much, the authors think. If this explanation were correct, you would expect to find sex ratios falling precipitously as girls who had been hidden at birth start entering the official registers on attending school or the doctor. In fact, there is no such fall. The sex ratio of 15-year-olds in 2005 was not far from the sex ratio at birth in 1990. The implication is that sex-selective abortion, not under-registration of girls, accounts for the excess of boys.


Posted by Orrin Judd at March 9, 2010 6:10 AM
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