, Should a non-rival public good be provided centrally?". We acknowledge with gratitude the financial support of the grant of the French Agency for Scientific Research (ANR contract STRAT-INEQ) and SSHRC. We are also indebted, with the usual disclaiming qualification

S. Athey, Comparative Statics Under Uncertainty, Quarterly Journal of Economics, vol.117, pp.187-223, 2002.

J. Drèze, Public Goods with Exclusion, Journal of Public Economics, vol.13, pp.5-24, 1980.

H. Fang and P. Norman, Optimal Provision of Excludable Public Goods, American Economic Journal: Microeconomics, vol.2, pp.1-37, 2010.

C. D. Fraser, On the Provision of Excludable Public Goods, Journal of Public Economics, vol.60, pp.111-130, 1996.

N. Gravel and M. Poitevin, The Progressivity of Equalization Payments in Federations, Journal of Public Economics, vol.90, pp.1725-1743, 2006.

M. F. Hellwig, Public Good Provision with Many Participants, Review of Economic Studies, vol.70, pp.589-614, 2003.

, A Utilitarian Approach to the Provision and Pricing of, 2005.

. Excludable-public-goods, The Provision and Pricing of, Journal of Public Economics, vol.89, issue.8, 1981.

. Ramsey-boiteux, Pricing versus Bundling, Journal of Public Economics, vol.91, pp.511-540

H. Moulin, Serial Cost Sharing of Excludable Public Goods, Review of Economic Studies, vol.61, pp.305-325, 1994.

P. Norman, Efficient Mechanisms for Public Goods with Use Restrictions, Review of Economic Studies, vol.71, pp.1163-1188, 2004.