时间：2026年6月16日下午2-5点
地点：邵逸夫科学馆206会议室（线下）
题目：Resale Markets for Differentiated Durable Goods: A Model of the Textile Industry
内容摘要：Despite the large environmental footprint of the rapidly expanding textile market, few economic models address the structure of textile and apparel markets. This paper examines the role of secondary markets by developing a simple dynamic model of a differentiated durable-goods market with infinitely lived consumers, extending the CES monopolistic competition framework of Dixit and Stiglitz (1977). Firms introduce new varieties in each period, and under free entry, the number of varieties is determined endogenously.
The option to resell acts as a demand subsidy: it lowers the prices of new goods, increases total durable-goods production, reduces product variety, and decreases consumer welfare, even in the representative consumer model, where no trade actually occurs in the secondary market. When consumers have heterogeneous preferences over new and used goods, total durable-goods production still increases by a shift in the population distribution toward a stronger preference for used goods.
In contrast, when there are two types of products – high-quality durable goods and low-quality perishable goods – the introduction of secondary markets increases demand for secondhand high-quality goods and reduces total production by substituting lowquality perishable goods for high-quality durable goods. A shift in the population distribution toward stronger preferences for used goods has the same effect. These results suggest that policies encouraging the use of secondhand goods may be effective in reducing environmental harm when products differ in durability.
主讲人介绍：王颖，现任俄罗斯高等经济大学（HSE University）博士后研究员。先后获加州大学伯克利分校应用数学学士学位、伦敦政治经济学院经济学硕士学位，并于2025年获波士顿学院经济学博士学位。主要研究方向为应用微观经济理论与实验经济学。
