<p>BARNOW, BS, GG CAIN, and AS GOLDBERGER (1980): "Issues in the Analysis of Selectivity Bias," Evaluation Studies Review Annual: Volume 5, 43.</p><p>题名：Issues in the Analysis of Selectivity Bias<br/>作者：BARNOW, BS, GG CAIN, and AS GOLDBERGER<br/>期刊全称或缩写：Evaluation Studies Review Annual<br/>年份，卷（期），起止页码： 1980, Volume 5, 43.<br/><br/></p><p>BARNOW, BS, G CAIN, and A GOLDBERGER (1981): "Selection on Observables," Evaluation Studies Review Annual, 5, 43-59.</p><p>题名：Selection on Observables<br/>作者：BARNOW, BS, GG CAIN, and AS GOLDBERGER<br/>期刊全称或缩写：Evaluation Studies Review Annual<br/>年份，卷（期），起止页码： 1980, Volume 5, 43-59.</p><p></p><p>这两篇有可能是同一篇，各处引用的标题和年份都不同，非常感谢各位的帮助！</p>

[此贴子已经被作者于2009-5-31 13:30:18编辑过]