1、【作者(必填)】Shea, J.

【文题(必填)】Instrument relevance in multivariate linear models: A simple measure.

【年份(必填)】 1997. Review of Economics & Statistics 79(2): 348–352.

【全文链接或数据库名称(选填)】

2、【作者(必填)】Godfrey, L. G.

【文题(必填)】Instrument relevance in multivariate linear models

【年份(必填)】1999. Review of Economics & Statistics 81(3): 550–552.

【全文链接或数据库名称(选填)】