Growing income inequality has coincided with the increasing importance of a college degree for earning a middle-class wage.
收入不平等加剧的同时，大学学位对获得中产阶级收入的重要性也在不断提高。
We calibrate this model to base case data and when we remove migration restrictions all wage and most income inequality disappears.
我们用基本事件数据来标准化这个模型，当我们把人口流动限制去掉之后，所有的工资和大部分的收入不平等消失了。
Meanwhile, growing income inequality has coincided with the increasing importance of a college degree for earning a middle-class wage.
与此同时，收入不平等加剧之际，要想赚到中产阶级的收入，大学学历的重要性越来越大了。
Meanwhile, growing income inequality has coincided with the increasing importance of a college degree for earning a middle-class wage.
与此同时，收入不平等加剧之际，要想赚到中产阶级的收入，大学学历的重要性越来越大了。
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