Reference

François Boldron, Helmuth Cremer, Philippe De Donder, Denis Joram, and Bernard Roy, “Network Externalities and the Universal Service Obligation: A Two Sided Market Approach”, in Progress in the Competitive Agenda in the Postal and Delivery Sector, Michael A. Crew, and Paul R. Kleindorfer (eds.), Edward Elgar, 2009, pp. 185–195.

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