AbstractThis paper considers the formation of risk-sharing networks. Following empirical findings, we build a model where risk-sharing takes place between pairs of individuals. We ask what structures emerge when pairs can agree to form links, but people cannot coordinate links across a population. We consider a benchmark model where identical individuals commit to share their monetary holdings equally with linked partners. We compare efficient networks to equilibrium networks. Efficient networks can (indirectly) connect all individuals and involve full insurance. However, equilibrium networks connect fewer individuals. There is an externality: when breaking a link individuals do not take into account the negative effect on others distant in the network. The network formation process can lead identical individuals to be in different positions and thus have different risk-sharing outcomes. These results may help explain empirical findings that risk-sharing is often not symmetric or complete.
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 CIRPEE in its series Cahiers de recherche with number 0526.
Date of creation: 2005
Date of revision:
Informal insurance; social networks;
Other versions of this item:
- O17 - Economic Development, Technological Change, and Growth - - Economic Development - - - Formal and Informal Sectors; Shadow Economy; Institutional Arrangements
- D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
- Z13 - Other Special Topics - - Cultural Economics - - - Economic Sociology; Economic Anthropology; Social and Economic Stratification
This paper has been announced in the following NEP Reports:
- NEP-ALL-2005-09-29 (All new papers)
- NEP-DEV-2005-09-29 (Development)
- NEP-FMK-2005-09-29 (Financial Markets)
- NEP-GTH-2005-09-29 (Game Theory)
- NEP-IAS-2005-09-29 (Insurance Economics)
- NEP-NET-2005-09-29 (Network Economics)
- NEP-SOC-2005-09-29 (Social Norms & Social Capital)
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.:
- de Janvry, Alain & Sadoulet, Elisabeth & Winters, Paul C. & Murgai, Rinku, 2000.
"Localized and Incomplete Mutual Insurance,"
12905, University of New England, School of Economics.
- Bloch, Francis & Genicot, Garance & Ray, Debraj, 2008.
"Informal insurance in social networks,"
Journal of Economic Theory,
Elsevier, vol. 143(1), pages 36-58, November.
- Francis Bloch (GREQAM and Universite de la Mediterranee), Garance Genicot (Georgetown University, and Debraj Ray (New York University and Instituto de Analisis Economico (CSIC)), 2004. "Informal Insurance in Social Networks," Working Papers gueconwpa~04-04-16, Georgetown University, Department of Economics.
- Francis Bloch & Garance Genicot, 2005. "Informal Insurance in Social Networks," 2005 Meeting Papers 156, Society for Economic Dynamics.
- Marcel Fafchamps & Susan Lund, .
"Risk Sharing Networks in Rural Philippines,"
97014, Stanford University, Department of Economics.
- Rosenzweig, Mark R & Stark, Oded, 1989.
"Consumption Smoothing, Migration, and Marriage: Evidence from Rural India,"
Journal of Political Economy,
University of Chicago Press, vol. 97(4), pages 905-26, August.
- Rosenzweig, Mark R. & Stark, Oded, 1987. "Consumption Smoothing, Migration and Marriage: Evidence from Rural India," Bulletins 7515, University of Minnesota, Economic Development Center.
- Coate, Stephen & Ravallion, Martin, 1993. "Reciprocity without commitment : Characterization and performance of informal insurance arrangements," Journal of Development Economics, Elsevier, vol. 40(1), pages 1-24, February.
- Kimball, Miles S, 1988. "Farmers' Cooperatives as Behavior Toward Risk," American Economic Review, American Economic Association, vol. 78(1), pages 224-32, March.
- Kirman, Alan, 1993. "Ants, Rationality, and Recruitment," The Quarterly Journal of Economics, MIT Press, vol. 108(1), pages 137-56, February.
- Garance Genicot & Debraj Ray, 2003.
"Group Formation in Risk--Sharing Arrangements,"
Review of Economic Studies,
Wiley Blackwell, vol. 70(1), pages 87-113, January.
- Stefan Dercon & Joachim de Weerdt, 2004.
"Risk-Sharing Networks And Insurance Against Illness,"
Development and Comp Systems
- De Weerdt, Joachim & Dercon, Stefan, 2006. "Risk-sharing networks and insurance against illness," Journal of Development Economics, Elsevier, vol. 81(2), pages 337-356, December.
- Stefan Dercon & Joachim De Weerdt, 2002. "Risk-sharing Networks and Insurance against illness," Economics Series Working Papers WPS/2002-16, University of Oxford, Department of Economics.
- Stefan Dercon & Joachim De Weerdt, 2002. "Risk-sharing networks and insurance against illness," CSAE Working Paper Series 2002-16, Centre for the Study of African Economies, University of Oxford.
- Jackson, Matthew O., 1998.
"The Evolution of Social and Economic Networks,"
1044, California Institute of Technology, Division of the Humanities and Social Sciences.
- Townsend, R.M., 1991.
"Risk and Insurance in Village India,"
University of Chicago - Economics Research Center
91-3, Chicago - Economics Research Center.
- Robert M. Townsend, . "Risk and Insurance in Village India," University of Chicago - Population Research Center 91-3a, Chicago - Population Research Center.
- De Weerdt, Joachim, 2002. "Risk-Sharing and Endogenous Network Formation," Working Paper Series UNU-WIDER Research Paper , World Institute for Development Economic Research (UNU-WIDER).
- Udry, Christopher, 1995. "Risk and Saving in Northern Nigeria," American Economic Review, American Economic Association, vol. 85(5), pages 1287-1300, December.
- Rothschild, Michael & Stiglitz, Joseph E., 1971. "Increasing risk II: Its economic consequences," Journal of Economic Theory, Elsevier, vol. 3(1), pages 66-84, March.
- Matthew O. Jackson & Asher Wolinsky, 1994.
"A Strategic Model of Social and Economic Networks,"
1098, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Coate, S. & Ravallion, M., 1989. "Reciprocity Without Commitment: Characterization and Performance of Informal Risk-Sharing Arrangements," Papers 96, Warwick - Development Economics Research Centre.
This item has more than 25 citations. To prevent cluttering this page, these citations are listed on a separate page. reading list or among the top items on IDEAS.Access and download statisticsgeneral information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Johanne Perron).
If references are entirely missing, you can add them using this form.