Peer Effects in Endogenous Networks
AbstractThis paper presents a simple model of strategic network formation with local complementarities in effort levels and positive local externalities for a general class of payoff functions. Results are obtained for one-sided and two-sided link creation. In both cases (pairwise) Nash equilibrium networks are nested split graphs, which are a strict subset of core-periphery networks. The relevance of the convexity of the value function (gross payoffs as a function of neighbours' effort levels when best responding) in obtaining nested split graphs is highlighted. Under additional assumptions on payoffs, we show that the only efficient networks are the complete and the empty network. Furthermore, there exists a range of linking cost such that any (pairwise) Nash equilibrium is inefficient and for a strict subset of this range any (pairwise) Nash equilibrium network structure is different from the efficient network. These findings are relevant for a wide range of social and economic phenomena, such as educational attainment, criminal activity, labor market participation, and R&D expenditures of firms.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by Suntory and Toyota International Centres for Economics and Related Disciplines, LSE in its series STICERD - Theoretical Economics Paper Series with number /2013/564.
Date of creation: Sep 2013
Date of revision:
Contact details of provider:
Web page: http://sticerd.lse.ac.uk/_new/publications/default.asp
Strategic network formation; peer effects; strategic complements; positive externalities.;
Find related papers by JEL classification:
- D62 - Microeconomics - - Welfare Economics - - - Externalities
- D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-10-11 (All new papers)
- NEP-CDM-2013-10-11 (Collective Decision-Making)
- NEP-COM-2013-10-11 (Industrial Competition)
- NEP-GTH-2013-10-11 (Game Theory)
- NEP-INO-2013-10-11 (Innovation)
- NEP-MIC-2013-10-11 (Microeconomics)
- NEP-NET-2013-10-11 (Network Economics)
- NEP-SOC-2013-10-11 (Social Norms & Social Capital)
- NEP-URE-2013-10-11 (Urban & Real Estate Economics)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Edward E. Glaeser & Bruce Sacerdote & Jose A. Scheinkman, 1995.
"Crime and Social Interactions,"
Harvard Institute of Economic Research Working Papers
1738, Harvard - Institute of Economic Research.
- Soramäki, Kimmo & Bech, Morten L. & Arnold, Jeffrey & Glass, Robert J. & Beyeler, Walter E., 2007.
"The topology of interbank payment flows,"
Physica A: Statistical Mechanics and its Applications,
Elsevier, vol. 379(1), pages 317-333.
- Case, A.C. & Katz, L.F., 1991.
"The Company You Keep: The Effects Of Family And Neighborhood On Disadvantaged Younths,"
Harvard Institute of Economic Research Working Papers
1555, Harvard - Institute of Economic Research.
- Anne C. Case & Lawrence F. Katz, 1991. "The Company You Keep: The Effects of Family and Neighborhood on Disadvantaged Youths," NBER Working Papers 3705, National Bureau of Economic Research, Inc.
- Luca De Benedictis & Lucia Tajoli, 2009.
"The World Trade Network,"
51-2009, Macerata University, Department of Finance and Economic Sciences, revised Mar 2009.
- Andrea Galeotti & Sanjeev Goyal, 2010.
"The Law of the Few,"
American Economic Review,
American Economic Association, vol. 100(4), pages 1468-92, September.
- Caroline Hoxby, 2000. "Peer Effects in the Classroom: Learning from Gender and Race Variation," NBER Working Papers 7867, National Bureau of Economic Research, Inc.
- Coralio Ballester & Antoni Calvó-Armengol & Yves Zenou, 2006.
"Who's Who in Networks. Wanted: The Key Player,"
Econometric Society, vol. 74(5), pages 1403-1417, 09.
- Coralio Ballester & Antoni Calvó-Armengol & Yves Zenou, 2004. "Who's Who in Networks. Wanted: The Key Player," Working Papers 178, Barcelona Graduate School of Economics.
- Ballester, Coralio & Calvó-Armengol, Antoni & Zenou, Yves, 2005. "Who’s Who in Networks. Wanted: The Key Player," CEPR Discussion Papers 5329, C.E.P.R. Discussion Papers.
- Coralio Ballester & Antoni Calvo-Armengol & Yves Zenou, 2005. "Who's Who in Networks. Wanted: the Key Player," NajEcon Working Paper Reviews 666156000000000586, www.najecon.org.
- Kennan,J., 2001.
"Uniqueness of positive fixed points for increasing concave functions on Rn : an elementary result,"
2, Wisconsin Madison - Social Systems.
- John Kennan, 2001. "Uniqueness of Positive Fixed Points for Increasing Concave Functions on Rn: An Elementary Result," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 4(4), pages 893-899, October.
- Bruce Sacerdote, 2001.
"Peer Effects With Random Assignment: Results For Dartmouth Roommates,"
The Quarterly Journal of Economics,
MIT Press, vol. 116(2), pages 681-704, May.
- Bruce Sacerdote, 2000. "Peer Effects with Random Assignment: Results for Dartmouth Roommates," NBER Working Papers 7469, National Bureau of Economic Research, Inc.
- Cohen, Wesley M & Levinthal, Daniel A, 1989. "Innovation and Learning: The Two Faces of R&D," Economic Journal, Royal Economic Society, vol. 99(397), pages 569-96, September.
- Venkatesh Bala & Sanjeev Goyal, 2000. "A Noncooperative Model of Network Formation," Econometrica, Econometric Society, vol. 68(5), pages 1181-1230, September.
- Topa, Giorgio, 2001. "Social Interactions, Local Spillovers and Unemployment," Review of Economic Studies, Wiley Blackwell, vol. 68(2), pages 261-95, April.
- Richard C. Levin & Peter C. Reiss, 1988. "Cost-Reducing and Demand-Creating R&D with Spillovers," RAND Journal of Economics, The RAND Corporation, vol. 19(4), pages 538-556, Winter.
- Baetz, Oliver, 0. "Social activity and network formation," Theoretical Economics, Econometric Society.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ().
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.