研究方法：蛛网模型和制度经济学分析方法。
Methods of cobweb model and institutional economic analysis are employed.
文章的出发点主要在于对保荐制度进行相关的制度经济学分析，以期对保荐制度进行深层透视。
The starting point of article lies in analysing the sponsor system based on the institution economics in order to study the sponsor system in deep layer perspective.
本文运用了比较法学与法经济学分析方法来探讨排污权交易制度。
This article utilizes the comparative law and the law economic analysis method to explore emission trading system.
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