求助几篇外文文献

【作者(必填)】Jinyong Hahn and Juergen Meinecke

【文题(必填)】Time-Invariant Regressor in Nonlinear Panel Model with Fixed Effects

【年份(必填)】Econometric Theory Vol. 21, No. 2 (Apr., 2005), pp. 455-469
【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/3533473?uid=3737800&uid=2129&uid=2134&uid=2&uid=70&uid=4&sid=21100895545221

【作者(必填)】Trevor S. Breusch, Grayham E. Mizon and Peter Schmidt

【文题(必填)】Efficient Estimation Using Panel Data

【年份(必填)】Econometrica  Vol. 57, No. 3 (May, 1989), pp. 695-700

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/1911060?uid=3737800&uid=2129&uid=2134&uid=2&uid=70&uid=4&sid=21100895545221

【作者(必填)】Christopher Cornwell

【文题(必填)】Simultaneousequations and paneldata

【年份(必填)】Volume 51, Issues 1–2, January–February 1992, Pages 151–181

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/030440769290033N

【作者(必填)】Gilbert E. Metcalf

【文题(必填)】Specificationtesting in paneldata with instrumentalvariables

【年份(必填)】Volume 71, Issues 1–2, March–April 1996, Pages 291–307

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/0304407694017069

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非常感谢！