Strategic pricing, lifespan choices and environmental implications of peer-to-peer sharing
构建理论模型分析点对点共享平台对垄断厂商定价、产品寿命和环境的影响，发现共享可能增加产量、缩短产品寿命并恶化环境，为实证研究提供理论解释。
Peer-to-peer sharing has become increasingly popular in recent years. Many digital platforms exist that allow individuals to use others’ belongings part-time. These platforms explicitly mention their green credentials, as the environmental benefits of such sharing initiatives are often taken for granted. However, there is a recent empirical literature showing evidence of the contrary. We propose a theoretical framework to analyze the economic and environmental implications of peer-to-peer sharing. We present a stylized model where a monopolist supplies a product that is suitable for rent on a sharing platform. Interestingly, we find that the existence of such a platform is typically beneficial for the monopolist, especially in the long run, when she can optimally anticipate the effects of her decisions on the sharing market. Such a scenario is not at all beneficial for consumers, especially for those who rent the good rather than buy it. Moreover, the existence of the sharing platform induces higher use and (under some likely conditions) larger production levels and shorter product lifespans. The combination of these three aspects contributes to a worse environmental impact with sharing, which provides a theoretical rationale for the aforementioned empirical studies.