Imperfect competition with complements and substitutes

• 成果类型: Article
• 署名作者: Quint, Daniel
• 署名单位: University of Wisconsin System; University of Wisconsin Madison
• 刊物名称: JOURNAL OF ECONOMIC THEORY
• ISSN/ISSBN: 0022-0531
• DOI: 10.1016/j.jet.2014.05.004
• 发表日期: 2014
• 页码: 266-290
• 关键词: Substitutes; complements; mergers; imperfect competition

摘要

I study price competition in settings where end products are combinations of components supplied by different monopolists, nesting standard models of perfect complements and imperfect substitutes. I show sufficient conditions for a discrete-choice demand system to yield demand for each product which is log-concave in price, and has log-increasing differences in own and another product's price, leading to strong comparative statics results. Many results familiar from simple models, like the price effects of mergers or changes in marginal costs, extend naturally to this more complex setting. (C) 2014 Elsevier Inc. All rights reserved.