求助几篇英文文献

小弟要找的文章多一点，但是我的币太少了，下载文章还要收流量币，真得节约着点用，哪位大侠帮帮忙吧

【作者(必填)】Badi H. Baltagi and James M. Griffin

【文题(必填)】A Generalized Error Component Model with Heteroscedastic Disturbances

【年份(必填)】International Economic Review Vol. 29, No. 4 (Nov., 1988), pp. 745-753

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/2526831?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】C. Radhakrishna Rao

【文题(必填)】Estimation of Heteroscedastic Variances in Linear Models

【年份(必填)】Journal of the American Statistical Association Vol. 65, No. 329 (Mar., 1970), pp. 161-172

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/2283583?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】C. Radhakrishna Rao

【文题(必填)】Estimation of Variance and Covariance Components in Linear Models

【年份(必填)】Journal of the American Statistical Association
Vol. 67, No. 337 (Mar., 1972), pp. 112-115

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/2284708?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】Robert F. Phillips

International Economic Review Vol. 44, No. 2 (May, 2003), pp. 501-521

【文题(必填)】Estimation of a Stratified Error-Components Model

【年份(必填)】International Economic Review Vol. 44, No. 2 (May, 2003), pp. 501-521

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/3663476?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】Rao S.R.S, Kaplan J. and Cochran W.C.,

【文题(必填)】Estimators for the one-way random effects model with unequal error variances

【年份(必填)】Journal of the American Statistical Association Vol. 76, No. 373 (Mar., 1981), pp. 89-97

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/2287050?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】Randolph W.C.,

【文题(必填)】A transformation for heteroscedastic error components regression models

【年份(必填)】Economics Letters 27, 349–354.1988

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/0165176588901619

【作者(必填)】Badi H. Baltagi and James M. Griffin

【文题(必填)】A generalized error component model with heteroscedastic

disturbances

【年份(必填)】International Economic Review Vol. 29, No. 4 (Nov., 1988), pp. 745-753

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/2526831?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21100941199223

【作者(必填)】Wansbeek T.J.,

【文题(必填)】An alternative heteroscedastic error components model, solution 88.1.1,

【年份(必填)】1989, Econometric Theory 5, 326.

【全文链接或数据库名称(选填)】http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7906053

A transformation for heteroscedastic error components regression models

表示压力很大啊。。。

还有两篇找不到了

An alternative heteroscedastic error components model,

A Generalized Error Component Model with Heteroscedastic Disturbances

Estimation of Heteroscedastic Variances in Linear Models

Estimation of a Stratified Error-Components Model

Estimation of Variance and Covariance Components in Linear Models

Estimators for the one-way random effects model with unequal error variances