Efficiency for the concave Order and Multivariate
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Fri, 07/05/2010 14:15 |
Dana Rose-Anne (Joint With OMI) (Dauphine) |
Nomura Seminar  |
DH 1st floor SR |
| comonotonicity joint work with Carlier and Galichon Abstact This paper studies efficient risk-sharing rules for the concave dominance order. For a univariate risk, it follows from a comonotone dominance principle, due to Landsberger and Meilijson that efficiency is characterized by a comonotonicity condition. The goal of the paper is to generalize the comonotone dominance principle as well as the equivalence between efficiency and comonotonicity to the multi-dimensional case. The multivariate case is more involved (in particular because there is no immediate extension of the notion of comonotonicity) and it is addressed by using techniques from convex duality and optimal transportation. | |||