From 1890 to 1990, the US antitrust policy went through many periods, such as tolerant period, dormancy period, rigor period, and efficiency period.

• 自1890年至1990年，美国的反托拉斯政策经历了“宽容期”、“休眠期”、“严厉期”和“效率主义时代”等多个历史时期。