伴随着Internet的普遍接入,拥堵正逐渐成为阻碍有效使用Internet网络资源的严重障碍。现有文献多从效用最大化和社会福利最大化出发,复杂地推导出一种价格机制。本文通过构造一个多用户差别定价模型,利用消费者剩余和生产者剩余的概念,简明直观地证明了差别价格能够提高经济效率,这是一种新的视角和解决方法。 With the universal access to the Internet, congestion is gradually becoming a serious obstacle to the efficient use of Internet network resources. The existing literature mostly proceed from utility maximization and social welfare maximization to derive a complicated price mechanism. In this paper, by constructing a multi-user differential pricing model and using the concept of consumer surplus and producer surplus, it is concise and intuitive to prove that different prices can improve economic efficiency. This is a new perspective and solution.