...样本选择模型 [gap=1635]Key words： medical insurance; elderly people; hospitalization; two-part model; sample selection model ...
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To introduce sample selection model and its estimation method.
介绍样本选择模型及其估计方法。
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The proposed sample selection model is tested on UCI dataset, which proves the efficiency of the model.
利用UCI标准数据集对本文所提出的样本选择模型进行测试，实验结果证明了该模型的有效性。
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