Bean F D, King A G, Passel J S
Demography. 1983 Feb;20(1):99-109.
This article reports the results of applying a sex ratio-based method to estimate the number of undocumented Mexicans residing in the United States in 1980. The approach centers on a comparison between the hypothetical sex ratio one would expect to find in Mexico in the absence of emigration to the United States and the sex ratio that is in fact reported in preliminary results from the 1980 Mexican Census. The procedure involves, inter alia, assuming a range of values for the sex ratio at birth and for census coverage differentials by sex in Mexico. Even the combinations of these values most likely to result in large estimates suggest that no more than 4 million illegal migrants of Mexican origin were residing in the United States in 1980.
本文报告了运用基于性别比的方法来估算1980年居住在美国的无身份墨西哥人的数量的结果。该方法的核心是将在没有向美国移民的情况下预计在墨西哥出现的假设性别比与1980年墨西哥人口普查初步结果中实际报告的性别比进行比较。该程序尤其包括为墨西哥的出生性别比和按性别划分的人口普查覆盖差异假设一系列值。即使是这些最有可能导致高估的数值组合也表明，1980年居住在美国的墨西哥裔非法移民不超过400万。
