Risk sharing and retrading in incomplete markets (Q382322)

This paper deals with retrading at a competitive equilibrium of an incomplete markets economy. The assumptions for the economy are chosen in such a way, that in the proofs of theorems the authors can use the transversality theorem and so they get characterizing (necessary and sufficient) results which hold generically. One of such a result characterizes the set of public signals that leads to retrading. The authors add some hints, that their results generalize former ones, e.g. Theorem 5 of [\textit{L. Blume} et al., Econ. Theory 29, No. 2, 379--394 (2006; Zbl 1108.91026)].