posted on 2021-09-21, 10:24authored bySisi Yin, Yunshu Gao, Bo GaoBo Gao
This paper develops a model of multi-product firms with endogenous quality across
products within a firm. The model can reconcile the empirical fact that product quality
and market size exhibit an inverted U relationship. In our model, on the one hand a
larger market has a larger scope of quality differentiation and induces firms to increase
quality; on the other hand, market competition is more intense in a larger market, exerting a negative influence on quality. We show that the model without taking quality
differentiation into consideration could significantly underestimate the market competition and welfare. Moreover, our numerical analysis suggests that the model without
taking quality differentiation into consideration could also significantly overestimate
the gains of trade liberalization.
This is the peer reviewed version of the following article: Yin, S., Gao, Y. and Gao, B., (2022). Multi-product firms, product quality heterogeneity and trade liberalization. The World Economy, 45 (6), pp.1856-1875, which has been published in final form at https://doi.org/10.1111/twec.13204. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited