因为一篇论文牵涉到Liu估计，学校没有购买T&F数据库，麻烦好心人帮帮忙，求助一下四篇论文
1.
Communications in Statistics - Theory and Methods Volume 33, Issue 11, 2004


More on Liu-Type Estimator in Linear Regression

DOI: 10.1081/STA-200037930
Kejian Liuab*
pages 2723-2733
Available online: 02 Sep 2006
链接：http://www.tandfonline.com/doi/abs/10.1081/STA-200037930#preview

2. Communications in Statistics - Theory and Methods Volume 32, Issue 5, 2003


Using Liu-Type Estimator to Combat Collinearity
DOI: 10.1081/STA-120019959
Kejian Liua*
pages 1009-1020
Available online: 27 Sep 2011
链接：http://www.tandfonline.com/doi/abs/10.1081/STA-120019959

3. Communications in Statistics - Theory and Methods Volume 37, Issue 20, 2008


Tuning Parameter Selection and Various Good Fitting Characteristics for the Liu-Type Estimator in Linear Regression

DOI: 10.1080/03610920802112909Hu Yanga & Jianwen Xua*
pages 3204-3215
Available online: 03 Sep 2008






链接：http://www.tandfonline.com/doi/abs/10.1080/03610920802112909

4. Communications in Statistics - Theory and Methods Volume 35, Issue 3, 2006


The General Expressions for the Moments of the Stochastic Shrinkage Parameters of the Liu Type Estimator

DOI: 10.1080/03610920500476572
Fikri Akdeniza*, George P. H. Styanb & Hans Joachim Wernerc
pages 423-437
Available online: 23 Sep 2006
链接：http://www.tandfonline.com/doi/abs/10.1080/03610920500476572






或者进入该页面就有上面四篇论文的链接，求助好心人帮帮忙，非常感谢！
http://www.tandfonline.com/action/doSearch?type=simple&filter=multiple&stemming=yes&searchText=Using+Liu-type+estimator+to+combat+collinearity&publication=40000844&x=41&y=23