Some evidence suggests that intergenerational mobility in the US has fallen some over time, which would lead to greater pessimism among poorer families about their children's prospects.
有证据显示，美国的代际收入流动比例有所下降，这就导致相对贫穷的家庭对孩子前途有着较严重的悲观情绪。
The Work Unit and Intergenerational Mobility: Is the work unit system declining?
单位与代际地位流动：单位制在衰落吗?。
The Work Unit and Intergenerational Mobility: Is the work unit system declining?
单位与代际地位流动：单位制在衰落吗?。
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