Multiple Activities in Networks

• 成果类型: Article
• 署名作者: Chen, Ying-Ju; Zenou, Yves; Zhou, Junjie
• 署名单位: Hong Kong University of Science & Technology; Hong Kong University of Science & Technology; Monash University; National University of Singapore
• 刊物名称: AMERICAN ECONOMIC JOURNAL-MICROECONOMICS
• ISSN/ISSBN: 1945-7669
• DOI: 10.1257/mic.20160253
• 发表日期: 2018
• 页码: 34-85
• 关键词: substance use; peer; crime; equilibrium; youth

摘要

We consider a network model where individuals exert efforts in two types of activities that are interdependent. These activities can be either substitutes or complements. We provide a full characterization of the Nash equilibrium of this game for any network structure. We show, in particular, that quadratic games with linear best-reply functions aggregate nicely to multiple activities because equilibrium efforts obey similar formulas to that of the one-activity case. We then derive some comparative-statics results showing how own productivity affects equilibrium efforts and how network density impacts equilibrium outcomes.