我们还发现，工资方程并不存在显著的自我选择偏误，这表现出样本中职工的工作流动性还不高。
Besides, we find no significant self-selection bias in the wage equations, which suggests poor job mobility in our samples.
我们还发现，工资方程并不存在显著的自我选择偏误，这表现出样本中职工的工作流动性还不高。
Besides, we find no significant self-selection bias in the wage equations, which suggests poor job mobility in our samples.
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