在他们的分析中，研究人员控制同届出生人口和人口学特征，如种族和教育。
In their analysis, the researchers control for birth cohort and demographic characteristics such as race and education.
社会变迁所引发的人口流动问题不仅涉及到经济学、人口学、社会学和管理学，同时也涉及到了教育领域。
The problem of people mobility caused by society changes affects not only economy, demography, sociology, managing, but also educational fields.
人口学研究的内容是人口变量，以及影响这些变量的原因和变量的决定后果。
Demography deals with population variables, as well as the factors influencing these variables and their consequences.
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