| Summary: | 碩士 === 逢甲大學 === 財經法律研究所 === 96 === The purpose of monopoly regulatory is to forbid monopolist abuse monopoly power, the market share is one factor to estimate the monopoly power. The law of Germany and the law of Taiwan specify the standard to estimate the monopoly power by the market share. There is no similar regulation in U.S. and in European Union. The purpose of merger regulatory is to avoid the effect of merger may be to substantially lessen competition or to tend to create a monopoly. The threshold of application for merger in U.S., European Union and Germany is accorting to “turnover”. It is accorting to “turnover” and “the market share” in Taiwan. The variation of market share is one factor to estimate the anticompetitive effect of merger in U.S., European Union, Germany, and Taiwan.
This thesis discussed the status of market share in monopoly and merger regulatory through analyzing the legislation and the cases of U.S., European Union and Germany, to review the legislation in Taiwan and propose.
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