T. K. Ahn, R. M. Isaac, and T. C. Salmon, Coming and going: Experiments on endogenous group sizes for excludable public goods, Journal of Public Economics, vol.93, issue.1-2, pp.336-351, 2009.
DOI : 10.1016/j.jpubeco.2008.06.007

A. Alesina, L. Ferrara, and E. , Participation in Heterogeneous Communities*, Quarterly Journal of Economics, vol.115, issue.3, pp.847-904, 2000.
DOI : 10.1162/003355300554935

J. Andreoni, Privately provided public goods in a large economy: The limits of altruism, Journal of Public Economics, vol.35, issue.1, pp.57-73, 1988.
DOI : 10.1016/0047-2727(88)90061-8

J. Andreoni, Giving with Impure Altruism: Applications to Charity and Ricardian Equivalence, Journal of Political Economy, vol.97, issue.6, pp.1447-58, 1989.
DOI : 10.1086/261662

J. Andreoni, Impure Altruism and Donations to Public Goods: A Theory of Warm-Glow Giving, The Economic Journal, vol.100, issue.401, pp.464-477, 1990.
DOI : 10.2307/2234133

J. Andreoni, An Experimental Test of the Public-Goods Crowding-Out Hypothesis, American Economic Review, vol.83, issue.5, pp.1317-1344, 1993.

J. Andreoni, Cooperation in Public Goods Experiments: Kindness and Confusion, American Economic Review, vol.85, issue.4, pp.891-904, 1995.

J. Andreoni, W. Gale, and J. Scholz, Charitable Contributions of Time and Money, 1996.

J. Andreoni and R. Petrie, Public goods experiments without confidentiality: a glimpse into fund-raising, Journal of Public Economics, vol.88, issue.7-8, pp.1605-1623, 2004.
DOI : 10.1016/S0047-2727(03)00040-9

J. Andreoni and A. Payne, Do Government Grants to Private Charities Crowd Out Giving or Fund-raising? The American Economic Review, pp.792-812, 2003.

J. Andreoni and A. Payne, Is crowding out due entirely to fundraising? Evidence from a panel of charities, Journal of Public Economics, vol.95, issue.5-6, pp.334-343, 2011.
DOI : 10.1016/j.jpubeco.2010.11.011

R. J. Auman and J. H. Dreze, Cooperative games with coalition structures, International Journal of Game Theory, vol.10, issue.4, pp.217-237117, 1974.
DOI : 10.1007/BF01766876

M. Bacharach, N. Gold, and S. Sugden, Beyond Individual Choice. Teams and Frames in Game Theory, 2006.

A. Ben-ner, Nonprofit Organizations: Why Do They Exist in Market Economies, 1986.

S. Rose-ackerman, The Economics of Nonprofit Institutions

T. C. Bergstrom and R. P. Goodman, Private demands for public goods, The American Economic Review, vol.63, issue.3, pp.280-296, 1973.

T. Bergstrom, L. Blume, and H. Varian, On the private provision of public goods, Journal of Public Economics, vol.29, issue.1, pp.25-49, 1986.
DOI : 10.1016/0047-2727(86)90024-1

B. Blecha, The Crowding Parameter and Samuelsonian Publicness, Journal of Political Economy, vol.95, issue.3, pp.622-631, 1987.
DOI : 10.1086/261474

M. Brewer and W. Gardner, Who is this "We"? Levels of collective identity and self representations., Journal of Personality and Social Psychology, vol.71, issue.1, pp.83-93, 1996.
DOI : 10.1037/0022-3514.71.1.83

J. Buchanan, An Economic Theory of Clubs, Economica, vol.32, issue.125, pp.125-126, 1965.
DOI : 10.2307/2552442

L. Cappellari, P. Ghinetti, and G. Turati, On time and money donations, The Journal of Socio-Economics, vol.40, issue.6, pp.853-867, 2011.
DOI : 10.1016/j.socec.2011.08.013

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.643.4732

P. Carlin, Evidence on the Volunteer Labor Supply of Married Women, Southern Economic Journal, vol.67, issue.4, pp.801-824, 2001.
DOI : 10.2307/1061572

J. Carpenter, P. Matthews, and O. Ong-'ong-'a, Why Punish? Social reciprocity and the enforcement of prosocial norms, Journal of Evolutionary Economics, vol.14, issue.4, pp.407-429, 2004.
DOI : 10.1007/s00191-004-0212-1

J. Cohen, Sources of Peer Group Homogeneity, Sociology of Education, vol.50, issue.4, pp.227-241, 1977.
DOI : 10.2307/2112497

J. Coleman, Social Capital in the Creation of Human Capital, American Journal of Sociology, vol.94, pp.95-120, 1988.
DOI : 10.1086/228943

C. Costa, L. Chalip, and B. Green, Reconsidering the Role of Training in Event Volunteers??? Satisfaction, Sport Management Review, vol.9, issue.2, pp.165-182, 2006.
DOI : 10.1016/S1441-3523(06)70024-9

H. Crumpler and G. Ph, An experimental test of warm glow giving, Journal of Public Economics, vol.92, issue.5-6, pp.1011-1021, 2008.
DOI : 10.1016/j.jpubeco.2007.12.014

G. Cuskelly, T. Taylor, R. Hoye, and S. Darcy, Volunteer Management Practices and Volunteer Retention: A Human Resource Management Approach, Sport Management Review, vol.9, issue.2, pp.141-63, 2006.
DOI : 10.1016/S1441-3523(06)70023-7

T. Ellingsen, M. Johannesson, J. Mollestrom, and S. Munkhammar, Social framing effects: Preferences or beliefs?, Games and Economic Behavior, vol.76, issue.1, pp.117-130, 2012.
DOI : 10.1016/j.geb.2012.05.007

A. Evers and B. Riedel, Governing diversity -conceptual and practical challenges illustrated by the example of the German child-care system. Research project TSFEPS " Changing Family Structure and Social Policy: Childcare Services as Sources of Social Cohesion, 2004.

S. Farquhar, Constructions of quality in early childhood centres. Thesis submitted for the degree of Doctor of Philosophy, 1993.

E. Fehr and K. Schmidt, A Theory of Fairness, Competition, and Cooperation, The Quarterly Journal of Economics, vol.114, issue.3, pp.817-868, 1999.
DOI : 10.1162/003355399556151

D. Foray, S. Thoron, and J. Zimmermann, Open software: knowledge openness and cooperation in cyberspace, 2007.
DOI : 10.1017/CBO9780511493201.013

E. L. Glaeser, D. I. Laibson, J. A. Scheinkman, and C. L. Soutter, Measuring Trust*, Quarterly Journal of Economics, vol.115, issue.3, pp.811-846, 2000.
DOI : 10.1162/003355300554926

C. W. Gordon and N. Babchuk, A Typology of Voluntary Associations, American Sociological Review, vol.24, issue.1, pp.22-29, 1959.
DOI : 10.2307/2089579

F. Guala, L. Mittone, and M. Ploner, Group membership, team preferences, and expectations, Journal of Economic Behavior & Organization, vol.86, pp.183-190, 2013.
DOI : 10.1016/j.jebo.2012.12.003

H. Hansmann, The Role of Nonprofit Enterprise, The Yale Law Journal, vol.89, issue.5, pp.835-901, 1980.
DOI : 10.2307/796089

H. Hansmann, Nonprofit Enterprise in the Performing Arts, The Bell Journal of Economics, vol.12, issue.2, pp.341-361, 1981.
DOI : 10.2307/3003560

H. Hansmann, A Theory of Status Organizations, Journal of Law Economics, & Organization, vol.2, issue.1, pp.119-130, 1986.

W. Hichri and A. Kirman, The emergence of coordination in public good games, The European Physical Journal B, vol.42, issue.2, pp.149-159, 2007.
DOI : 10.1140/epjb/e2007-00032-8

URL : https://hal.archives-ouvertes.fr/halshs-00161572

R. Hoye, G. Cuskelly, T. Taylor, and S. Darcy, Volunteer motives and Retention in community sport. A study of Australian rugby clubs, Australian Journal of Volunteering, vol.13, issue.2, pp.40-48, 2008.

J. Kushman, A Three-Sector Model of Day Care Center Services, The Journal of Human Resources, vol.14, issue.4, pp.543-562, 1979.
DOI : 10.2307/145323

J. Laville and R. Sainsaulieu, Les fonctionnements associatifs, Sociologie de l'association, Sociologie économique, pp.271-297, 1997.

M. Macguire, Group Segregation and Optimal Jurisdictions, Journal of Political Economy, vol.82, issue.1, pp.112-132, 1974.
DOI : 10.1086/260173

M. Mcpherson and L. Lovin, Homophily in Voluntary Organizations: Status Distance and the Composition of Face-to-Face Groups, American Sociological Review, vol.52, issue.3, pp.370-379, 1987.
DOI : 10.2307/2095356

P. Menchik and B. Weisbrod, Volunteer labor supply, Journal of Public Economics, vol.32, issue.2, pp.159-183, 1987.
DOI : 10.1016/0047-2727(87)90010-7

P. Moss, Defining Quality: Values, Stakeholders and Processes, 1994.
DOI : 10.4135/9781446252048.n1

T. Offerman, J. Sonnemans, and A. Schram, Value Orientations, Expectations and Voluntary Contributions in Public Goods, The Economic Journal, vol.106, issue.437, pp.817-845, 1996.
DOI : 10.2307/2235360

C. Okten and B. Weisbrod, Determinants of donations in private nonprofit markets, Journal of Public Economics, vol.75, issue.2, pp.255-272, 2000.
DOI : 10.1016/S0047-2727(99)00066-3

M. Olson, The Logic of Collective Action: Public Goods and the Theory of Groups, 1971.

P. Popielarz and M. Mcpherson, On the Edge or In Between: Niche Position, Niche Overlap, and the Duration of Voluntary Association Memberships, American Journal of Sociology, vol.101, issue.3, pp.698-720, 1995.
DOI : 10.1086/230757

L. Prouteau and F. Wolff, Donner son temps : les b??n??voles dans la vie associative, Economie et statistique, vol.372, issue.1, 2004.
DOI : 10.3406/estat.2004.7264

D. Ray and R. Vohra, Coalitional Power and Public Goods, Journal of Political Economy, vol.109, issue.6, pp.1355-1384, 2001.
DOI : 10.1086/323275

D. Ribar and M. Wilhelm, Altruistic and Joy???of???Giving Motivations in Charitable Behavior, Journal of Political Economy, vol.110, issue.2, 2002.
DOI : 10.1086/338750

A. Rose, The Study of Human Relations, 1965.

S. Rose-ackerman, Do Government Grants to Charity Reduce Private Donations, 1986.

S. Rose-ackerman, The Economics of Nonprofit Institutions

S. Rose-ackerman, Altruism, nonprofits, and economic theory, Journal of Economic Literature, pp.701-728, 1996.

J. Ross, Toward a Reconstruction of Voluntary Association Theory, The British Journal of Sociology, vol.23, issue.1, pp.20-32, 1972.
DOI : 10.2307/588154

L. Salamon, W. Sokolowski, and R. List, Global Civil Society: An Overview. The Johns Hopkins Comparative Nonprofit Sector Project, 2003.

P. Samuelson, The Pure Theory of Public Expenditure, The Review of Economics and Statistics, vol.36, issue.4, pp.387-389, 1954.
DOI : 10.2307/1925895

P. G. Schervish and J. J. Havens, Social participation and charitable giving: A multivariate analysis, Voluntas, vol.51, issue.4, pp.235-260, 1997.
DOI : 10.1007/BF02354199

R. Steinberg, Voluntary Donations and Public Expenditures in a Federalist System, 1987.

R. Sugden, Reciprocity: The Supply of Public Goods Through Voluntary Contributions, The Economic Journal, vol.94, issue.376, pp.772-787, 1984.
DOI : 10.2307/2232294

B. Weisbrod, The Voluntary Nonprofit Sector. An Economic Analysis, 1977.

B. Weisbrod, Toward a theory of the voluntary nonprofit sector in a three-sector economy, The Economics of Non Profit Instituitions, 1986.

B. Weisbrod, The non-profit mission an its financing: Growing links between nonprofits and the rest of the economy, 2000.

S. Ziemek, Economic analysis of volunteers??? motivations???A cross-country study, The Journal of Socio-Economics, vol.35, issue.3, 2006.
DOI : 10.1016/j.socec.2005.11.064