Child sex preference in the U.S.

Today's Times contains an article on a 2008 study of the sex ratio among U.S.-born Asian American children in the 2000 Census by Doug Almond and Lena Edlund. Birth order was important; they found the sex ratio of the first child looked to be distributed about 50-50. It was the sex of the second child and on that appeared to reflect an abnormal male bias.