Methods of Monitoring the Change of Sex Ratio at Birth

摘要

Using census and sampling survey data of China and other countries,this paper studies demographic and statistic methods of monitoring the changes of sex ratio at birth. In the demographic approach, the basic character and basic changing pattern of sex ratio at birth,sex ratio by birth order and sex ratio by parity progression are summarized. In the statistic approach, methods of monitoring sex ratio at birth by small sample are summarized.From the simulation,this paper has confirmed that the Bayes method is more suitable than other simple statistic methods to monitoring sex ratio at birth.