垄断的经济学界定是其立法界定的基础。然而,该问题并未解决,经济学家的方法与标准不尽相同,对相关行为的社会效果的评价也见仁见智。看来,开展有关问题的研究已是当务之急。 一、经济学方法 市场结构的方法、企业行为的方法及市场运行的方法等各有其分析问题的角度,也各有利弊。 (一)结构的方法 该方法就最低限度的卖方数量和这些卖方集中的程度来设定某些结构标准。例如,它确定最大的一家或若干家企业所允许占有的最大市场份额。高于此份额,则主张进行行政和司法干 The definition of monopoly economics is the basis of its legislative definition. However, the problem has not been solved. The methods and standards of economists are not the same. The evaluation of the social effects of relevant behaviors is also a matter of opinion. It seems that the development of relevant issues of research is a top priority. First, the economic method Market structure method, the method of enterprise behavior and market operation methods have their own analysis of the problem point of view, also has its own advantages and disadvantages. (I) Structure method This method sets some structural standards for the minimum number of sellers and the concentration of these sellers. For example, it determines the maximum market share allowed by the largest firm or firms. Above this share, advocates for administrative and judicial intervention