Analyses of 1st-borns with and without other siblings (as of March 31st 2011).
收藏数据链接：
官方服务：
资源简介：
*p-value for comparison of 1st-borns with siblings vs. 2nd or later-borns.∧p-value for comparison of 1st-borns with no siblings vs. 2nd or later-borns.# As of March 31st 2011.
创建时间：
2015-12-02
