利用logit模型判定数据缺失机制

Using logit model to test the data missing mechanism

利用logit模型刻画了缺失指示变量R的分布,由其分布的参数估计来判定数据的缺失机制类型.在四个假定的基础上,用五个步骤具体操作缺失数据的机制检验.并用两个例子说明了检验的具体步骤.

Logit model was used to depict the distribution of the missing indicator variable. The data missing mechanism was tested according to its parameter estimations. On the basis of four assumptions, this paper uses five steps were used to operate the test of the missing mechanism. Two examples were illustred to show the details of the test.