RT Journal Article T1 Multidimensional bargaining and posted prices A1 Hagen, Martin Norbert A1 Hernando, Ángel AB A seller and a buyer bargain over the quantities and prices of multiple goods. Both agents have private information about their preferences. Utility is quasilinear in money. We show that a deterministic mechanism satisfies (i) dominant-strategy incentive compatibility, (ii) ex-post individual rationality and (iii) ex-post budget balance if and only if it is a posted-price mechanism. A similar, more general result holds if (iii) is replaced by ex-post collusion-proofness and a no-free lunch condition. We provide a unified proof of both findings via the property of non-bossiness. PB Elsevier SN 0022-0531 YR 2021 FD 2021-09-01 LK https://hdl.handle.net/10016/35479 UL https://hdl.handle.net/10016/35479 LA eng NO We gratefully acknowledge financial support from the Spanish Ministry of Economy and Competitiveness, grants MDM 2014-0431 and ECO2015-68406-P, as well as from Comunidad de Madrid, grant MadEco-CM. DS e-Archivo RD 1 sept. 2024