Pass-through, welfare, and incidence under imperfect competition

• 成果类型: Article
• 署名作者: Adachi, Takanori; Fabinger, Michal
• 署名单位: Kyoto University; Kyoto University; University of Tokyo
• 刊物名称: JOURNAL OF PUBLIC ECONOMICS
• ISSN/ISSBN: 0047-2727
• DOI: 10.1016/j.jpubeco.2021.104589
• 发表日期: 2022
• 关键词: imperfect competition; pass-through; Marginal Value of Public Funds; incidence; sufficient statistics

摘要

This paper provides a comprehensive framework to study welfare effects of multiple policy interventions and other external changes under imperfect competition with emphasis on specific and ad valorem taxation as a leading case. Specifically, in relation to tax pass-through, we provide sufficient statistics formulas for two welfare measures under a fairly general class of demand, production cost, and market competition. The measures are (i) marginal value of public funds (i.e., the marginal change in consumer and producer surplus relative to an increase in the net cost to the government), and (ii) incidence (i.e., the ratio of a marginal change in consumer surplus to a marginal change in producer surplus). We begin with the case of symmetric firms facing both unit and ad valorem taxes to derive a simple and empirically relevant set of formulas. Then, we provide a substantial generalization of these results to encompass firm heterogeneity by using the idea of tax revenue that is specified as a general function parameterized by a vector of policy instruments including government and non-government interventions and costs other than taxation.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).