外来人口对中国城市地区出生性别比的影响

Impact of Migrant Population on Sex Ratio at Birth in Urban China

外来人口对中国城市地区出生性别比的影响是近年来学术界争论的焦点问题之一。利用2000年人口普查数据,通过比较农村本地人口、城市本地人口和城市外来人口三个人口群体在出生性别比上的差异,并进行多元统计分析,考察20世纪90年代以来中国城市地区异常偏高的出生性别比是否由外来人口造成?结果表明,城市外来人口生育的性别偏好与农村本地人口和城市本地人口相比没有显著差异,都存在强烈的生男意愿。20世纪90年代以来中国生育水平迅速下降的同时,出生性别比出现了不分城乡的普遍升高和偏高,城市出生性别比偏高,既有外来人口的作用,也有本地人口的作用,外来人口并不是造成中国城市地区出生性别比偏高的唯一或主要的原因。

Using the 2000 census data,this paper examines the pattern of sex ratio at birth （SRB） in urban China and its association with migrant population. To address the question whether the abnormal SRB in urban China in the 1990s is a result of sex - selective childbearing of the migrant populatlon,the papex compares SRB between rural permanent resldents,urban permanent residents anti urban ,migrant population by controlling a number d soclo -demographic variables. Results d logistic regression show that SRB d the migrant population does not differ significantly from that of rural permanent and urban pormanent residents. Strong son preference exists in both rural and urban areas. Rising and abnormal SRB in urban China is not solely the responsibility of the migrant population.