关键词: 数字经济 , 转换成本 , 创新活动 , 策略竞争 , 竞争政策

Abstract: This paper studies the competition strategy of the internet industry competing for market share through product innovation activities in the presence of switching costs and network effectsThis paper finds that the main purpose of some “innovations” is to exclude competitionThis paper also shows a typical development process of the internet industry as followsEnterprises rely on strategic innovation supported by external financing to reduce the cost of consumers switching to their products，compete for market share，and move toward mergers under the constraints of financial constraints，and finally raise the degree of market concentrationParticularly，the existence of switching costs gives companies the incentive to control the switching cost exante，compete for expost market power，and “harvest” users lockedin

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