本文通过引入一个现实案例(Napster)来讨论信息产品的共享问题。首先,我们解释了信患产品共享产生的原因;然后,我们对此进行了福利分析,并证明:如果信息产品的共享采取俱乐部这种组织方式,不仅消费者的福利水平可以得到提高,生产者同样也有向市场提供信患产品的激励,换言之,帕雷托意义上的效率改进是可能的。 This article discusses the sharing of information products by introducing a reality case (Napster). First of all, we explain the causes of the product sharing. Then we analyze the benefits and prove that if the sharing of information products adopts the organization of clubs, not only the welfare level of consumers can be improved, but also the producers There is also the incentive to provide the market with products of information and belief, in other words, efficiency improvements in the Pareto sense are possible.