In this paper we use data from the 1 Per Cent Sample of the 1990 Censu
s of China to calculate sex ratios for the Chinese provinces that are
specific not only to parity, but also to the sex composition of previo
usly-born children. We analyze the degree of relationship among and be
tween the SRB's and then consider the phenomenon of son preference. We
find the variation in sex ratios at birth among the Chinese provinces
is related in an important way to variation among the provinces in th
e degree of son preference. Our analysis shows abnormally high SRB's i
n most of the provinces of China, especially at parities 2 and higher
when the prior births were daughters. Other societies, namely Taiwan a
nd South Korea, with rapid fertility decline and strong son preference
also manifest abnormally high SRB's at parities beyond the first.