National Child Development Study: Age 23, Sweep 4, 1981, and Public Examinati...
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Abstract copyright UK Data Service and data collection copyright owner. The National Child Development Study (NCDS) is a continuing longitudinal study that seeks to...
本摘要版权归英国数据服务中心（UK Data Service）及数据采集版权所有者所有。全国儿童发展研究（National Child Development Study, NCDS）是一项持续进行的纵向研究，旨在……
