Reference

Helmuth Cremer, Bernard Roy, Joëlle Toledano, and Étienne de Villemeur, Worksharing, Pricing and Competition in the Postal Sector, in Regulatory and Economics Challenges in the Postal and Delivery Sector, Michael A. Crew, and Paul R. Kleindorfer (eds.), Boston : Kluwer, series “Topics in Regulatory Economics and Policy, 2005, pp. 139–161.