His insights expanded the scope of economics.
他的高见扩展了经济学的范围。
Chapter 4, firstly, introduces the economic effects of virtual enterprise including economics of scale effects, economics of scope effects and economics of speed effects.
第4章首先介绍了虚拟企业的经济效应，包括规模经济效应、范围经济效应及速度经济效应。
It is not only a problem in the scope of economics, but also is an important problem that should be solved in the field of sociology, especially in the field of social security.
它不仅仅是一个经济学研究的问题，更是社会学特别是社会保障学要研究和解决的一个重要问题。
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