经济学论证国家存在的必要性有两个进路:市场失灵说和交易成本说。
Then it uses the request - proxy theory, the property right and cost of exchange theory, rent-seeking theory to explain the superiority property right.运用委托——代理理论,产权和交易费用理论,寻租理论论述民营银行的产权优势的成因。
The scale which is scientific and reasonable ensures that profit is improved, cost of exchange is reduced and enterprise competitive competence is increased, economy of scale is come true as well.科学合理的规模结构不仅是实现规模经济的基本条件,而且是提高经济效益、降低交易成本、获得较高的企业竞争力的重要保证。