2018

Multiple Activities in Networks

Reprint No. 2018:48

Author(s): Ying-Ju Chen, Yves Zenou and Junjie ZhouYear: 2018 Title: American Economic Journal: Microeconomics Volume (No.): 10 (3) Pages: 34–85
Online article (restrictions may apply)


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.


Reference:
Chen, Ying-Ju, Yves Zenou and Junjie Zhou (2018), "Multiple Activities in Networks". American Economic Journal: Microeconomics 10(3), 34–85.

Interdisciplinary European Studies

The European Union in a Changing World Order

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This book explores how the European Union responds to the ongoing challenges to the liberal international order. These challenges arise both within the EU itself and beyond its borders, and put into question the values of free trade and liberal democracy. 

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