作为教育经济学研究的核心问题，研究教育对经济的贡献具有重大的意义。
As a core problem, it's important to study the contribution that education makes to the economy.
定量测算教育对经济增长的贡献率，是教育经济问题研究的难题之一。
It is one of difficult problems in educational economy to quantitatively calculate the contributive rate of education to economic growth.
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