来自经济学和人口学的模型成为检验社会保障财政基础的最权威工具。
Models from economics and demography become the definitive tools for examining the financial base of social security.
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.
在人口迁移的空间选择聚集这种现象背后，必然存在着一种经济学可以解释的经济关系和逻辑。
Behind this phenomenon of the spatial selection and aggregation of migrants, there is the economic relation and logic that can be explained by economics.
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