Then, with control on other variables and labor market self-selection, the results of simple wage regression indicate that gender wage gap was significantly rising over time.
然后，控制了个人和工作特征及劳动力市场选择的影响，简单工资方程回归结果显示男性和女性劳动力存在显著的性别工资差异，并有扩大的趋势。
It mainly researches the rationality of regression model and the independent variables selection.
主要研究模型假设的合理性和自变量的选择。
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