Working paper Secession-Proof Cost Allocations and Stable Group Structures in Models of Horizontal Differentiation Michel Le Breton, and Shlomo Weber IDEI Working Paper n. 210, 2003 ReferenceMichel Le Breton, and Shlomo Weber, “Secession-Proof Cost Allocations and Stable Group Structures in Models of Horizontal Differentiation”, IDEI Working Paper, n. 210, 2003.