nep-des 2022-10-03 papers

on Economic Design

Issue of 2022‒10‒03
two papers chosen by
Guillaume Haeringer, Baruch College and Alex Teytelboym, University of Oxford

Regret-free truth-telling voting rules By R. Pablo Arribillaga; Agust\'in G. Bonifacio; Marcelo Ariel Fernandez
The Existence of Equilibrium Flows By Alfred Galichon; Larry Samuelson; Lucas Vernet

By:	R. Pablo Arribillaga; Agust\'in G. Bonifacio; Marcelo Ariel Fernandez
Abstract:	We study the ability of different classes of voting rules to induce agents to report their preferences truthfully, if agents want to avoid regret. First, we show that regret-free truth-telling is equivalent to strategy-proofness among tops-only rules. Then, we focus on three important families of (non-tops-only) voting methods: maxmin, scoring, and Condorcet consistent ones. We prove positive and negative results for both neutral and anonymous versions of maxmin and scoring rules. In several instances we provide necessary and sufficient conditions. We also show that Condorcet consistent rules that satisfy a mild monotonicity requirement are not regret-free truth-telling. Successive elimination rules fail to be regret-free truth-telling despite not satisfying the monotonicity condition. Lastly, we provide two characterizations for the case of three alternatives and two agents.
Date:	2022–08
URL:	http://d.repec.org/n?u=RePEc:arx:papers:2208.13853&r=

The Existence of Equilibrium Flows

By:	Alfred Galichon; Larry Samuelson; Lucas Vernet
Abstract:	Galichon, Samuelson and Vernet (2022) introduced a class of problems, equilibrium flow problems, that nests several classical economic models such as bipartite matching models, minimum-cost flow problems and hedonic pricing models. We establish conditions for the existence of equilibrium prices in the equilibrium flow problem, in the process generalizing Hall's theorem.
Date:	2022–09
URL:	http://d.repec.org/n?u=RePEc:arx:papers:2209.04426&r=

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