共享消费市场的均衡模型研究

Research on Equilibrium Model of Collaborative Consumption Market

基于一些假设条件,建立耐用消费品P2P共享消费市场的短期均衡、长期均衡的基本模型及其扩展模型,并进一步研究共享消费市场需求曲线及社会福利的变化。结果表明:共享消费市场的短期均衡租金和均衡交换数量受各类消费者使用时间、消费者类型占比、市场带入成本(BTM成本)等因素影响;长期均衡租金恒等于耐用消费品的单位购买价格,与是否拥有物品所有权无关;共享消费市场的出现并不一定会使耐用消费品的拥有量减少,当短期均衡租金高于单位购买价格时,耐用消费品拥有量不减反增;通过共享消费市场重新配置闲置资源,实现卡尔多-希克斯改进,提升社会福利水平。

Under some assumptions, the short-term equilibrium model, the long-term equilibrium model and their extended models about P2P collaborative consumption market of durables are established. And changes of market demand curve and social welfare issue in collaborative consumption market are studied. The results show that the market short-term equilibrium rent and exchange quantity are affected by factors such as the use times of consumers, the proportion of consumer types, the bringing-to-market (BTM) costs and so on. The long-term equilibrium rent is identically equal to the unit purchase price in the long-term equilibrium model and has nothing to do with ownership. The emergence of the collaborative consumption market may not necessarily decrease the ownership of consumer durables. The quantity of consumer durables has increased rather than decreased when the short-term equilibrium rent is higher than the unit purchase price. The reallocation of idle resources in collaborative consumption market is considered to be a Kaldor-Hicks efficiency, and has raised the level of social welfare.