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关注：1
2013-05-23 12:21
求翻译：关于部分医疗消费为零的现象，一些研究使用Heckman选择模型试图克服样本选择偏差问题(Hay,Leu 和Fohrer,1987)。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
关于部分医疗消费为零的现象，一些研究使用Heckman选择模型试图克服样本选择偏差问题(Hay,Leu 和Fohrer,1987)。
问题补充： |
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2013-05-23 12:21:38
Zero on the part of the phenomenon of health care spending, some studies use the Heckman selection model attempts to overcome the sample selection bias problem (Hay, Leu and Fohrer, 1987).
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2013-05-23 12:23:18
On some of the medical consumption to zero phenomenon, and a number of research using Heckman choose sample models attempt to overcome Leu choice, questions of bias and Fohrer Hay ( ) in 1987.
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2013-05-23 12:24:58
Expends about the partial medical services for the zero phenomenon, some research uses the Heckman choice model to attempt to overcome the sample choice deviation question (Hay, Leu and Fohrer,1987).
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2013-05-23 12:26:38
Some medical consumption to zero in on, some studies use Heckman selection models try to overcome a sample selection bias issues (Hay,Leu and Fohrer,1987).
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2013-05-23 12:28:18
Some medical consumption to zero in on, some studies use Heckman selection models try to overcome a sample selection bias issues (Hay,Leu and Fohrer,1987).
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