从数学的角度给出并证明了在数理经济学中非常重要的利润函数与供给映射的几个性质。
The article deals with a few important properties of profit function and supply mapping in the mathematical economics from the view of mathematics.
本文站在经济学的视角下，结合宏微观知识，用供给需求曲线与外部性来分析武汉市交通拥堵的原因；
This stand economics perspective, the combination of macro and micro knowledge, and use of supply and demand curves to analyze the external traffic congestion because of Wuhan City;
本文从信息经济学的角度，通过对信用市场中的信誉机制与信用资源的供给的分析，揭示了我国信用缺失的微观机理及其主要影响因素。
Through analyzing the relationship between reputation mechanism and supply of credit-ability resource, the paper explicated the main reasons that lead to creditability deficiency of credit market.
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