On two basic properties of equilibria of voting with exit

We consider the problem of a society whose members must choose from a finite set of alternatives. After knowing the chosen alternative, members may reconsider their membership. Thus, they must take into account, when voting, the effect of their votes not only on the chosen alternative but also on the final composition of the society. We show that, under plausible restrictions on preferences, equilibria of this two-stage game satisfy stability and voter's sovereignty.

Individually rational rules for the division problem when the number of units to be allotted is endogenous

Altres ajunts: Universidad Nacional de San Luirant (319502) ; Xunta de Galicia (ED431B2019/34) ; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (PIP 112-200801-00655)We study individually rational rules to be used toallot, among a group of agents, a perfectly divisiblegood that is freely available only in whole units. Arule is individually rational if, at each preferenceprofile, each agent finds that her allotment is at leastas good as any whole unit of the good. We study andcharacterize two individually rational and efficientfamilies of rules, whenever agents' preferences aresymmetric single-peaked on the set of possibleallotments. Rules in the two families are in additionenvy-free, but they differ on whether envy-freeness isconsidered on losses or on awards. Our main resultstates that (a) the family of constrained equal lossesrules coincides with the class of all individuallyrational and efficient rules that satisfy justified envy-freeness on losses and (b) the family of constrainedequal awards rules coincides with the class of all in-dividually rational and efficient rules that satisfyenvy-freeness on awards

Discusiones en torno a los sistemas de subsistencia pre y post hispánicos en la Provincia de Mendoza

This paper explores the main contributions and transformations that took place among the subsistence studies in Mendoza province during the last 80 years. It is focused in the zooarchaeological, archaeobotanical and stable isotopes contributions, as well as in the generation of actualistic information. A statement of the current knowledge is presented, as well as an essay about human adaptative variability in relation to the type and intensity of the exploited resources, both in temporal and spatial scales. Finally, some future challenges are discussed, related to the possible lines of work and the applications of this knowledge to other applications outside our disciplineEl trabajo describe los principales avances y transformaciones que han tenido los estudios de subsistencia en la provincia de Mendoza a largo de los últimos 80 años. La descripción se centra principalmente en los aportes de la zooarqueología, la arqueobotánica y los isótopos estables, así como en la generación de información actualística. Se presenta una descripción del estado actual del conocimiento y se ensaya una síntesis acerca de la variabilidad adaptativa humana en relación con el tipo e intensidad de recursos explotados en escalas temporales y espaciales. Finalmente se discuten algunos desafíos que se abren al futuro acerca de las posibles líneas de trabajo y las aplicaciones de este conocimiento hacia otros ámbitos fuera de nuestra disciplina

Estimación de edades arqueológicas usando la hidratación de obsidianas: dos fuentes de los andes meridionales

Obsidian is abundant in archaeological sites throughout Mendoza Province, Argentina but no obsidian hydration rates exist to date these assemblages. Direct dating of obsidian artifacts is particularly important in west-central Argentina because the surface record is extensive but well-defined time marker artifacts are lacking. The costs of non-optical hydration dating techniques currently preclude their regular use in the region, however. We present and evaluate 12 models for age estimation based on optical hydration rim measurements for the two most commonly used obsidian types in the region (Las Cargas and Laguna del Maule). Age estimation equations are derived for each source using observed hydration rim-radiocarbon date pairs, and parameterized by variables known to influence obsidian hydration in experimental settings. The equations advanced here are currently best at predicting the known ages of artifacts independently dated by radiocarbon, and can be cautiously used to estimate the ages of obsidian artifacts.Las obsidianas son abundantes en los sitios arqueológicos de la provincia de Mendoza (Argentina). Sin embargo, hasta el momento no existen estimaciones para las tasas de hidratación de estas rocas que puedan utilizarse para fechar esos conjuntos líticos. La realización de fechados directos sobre artefactos de obsidiana resulta particularmente importante para esta región, dado que existe un vasto registro arqueológico de superficie –compuesto principalmente por artefactos líticos– y solo se cuenta con tipos morfológicos cronológicamente sensibles para el Holoceno Tardío. Aquí se presentan y evalúan 12 modelos para estimar las edades de los artefactos de obsidiana basados en la medición óptica de los anillos de hidratación. Específicamente estos modelos fueron desarrollados para las dos obsidianas más comunes en los contextos arqueológicos de la región, procedentes de las fuentes de Las Cargas y Laguna del Maule. Las edades estimadas son derivadas para cada fuente a partir de pares de medición del espesor de la corteza de hidratación-fechado radiocarbono, y calibradas con variables cuya influencia sobre la hidratación ha sido establecida experimentalmente. Las ecuaciones que presentamos son actualmente las que mejor predicen las edades conocidas de artefactos que han sido fechados independientemente por radiocarbono y, por lo tanto, pueden utilizarse con cautela para estimar la antigüedad de los artefactos de obsidiana procedentes de la región.Fil: Garvey, Raven. University of Michigan; Estados UnidosFil: Carpenter, Tim. Archaeometrics; Estados UnidosFil: Gil, Adolfo Fabian. Universidad Nacional de Cuyo. Facultad de Filosofía y Letras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla; ArgentinaFil: Neme, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla; ArgentinaFil: Bettinger, Robert. University of California at Davis; Estados Unido

The Division Problem under Constraints

The work of G. Bergantiños is partially supported by research grants ECO2008-03484-C02-01 and ECO2011-23460 from the Spanish Ministry of Science and Innovation and FEDER. J. Massó acknowledges financial support from the Spanish Ministry of Economy and Competitiveness, through the Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2011-0075) and through grant ECO2008-0475-FEDER (Grupo Consolidado-C), and from the Generalitat de Catalunya, through the prize "ICREA Academia" for excellence in research and grant SGR2009-419. The work of A. Neme is partially supported by the Universidad Nacional de San Luis, through grant 319502, and by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), through grant PIP 112-200801-00655.The division problem under constraints consists of allocating a given amount of an homogeneous and perfectly divisible good among a subset of agents with single-peaked preferences on an exogenously given interval of feasible allotments. We characterize axiomatically the family of extended uniform rules proposed to solve the division problem under constraints. Rules in this family extend the uniform rule used to solve the classical division problem without constraints. We show that the family of all extended uniform rules coincides with the set of rules satisfying efficiency, strategy-proofness, equal treatment of equals, bound monotonicity, consistency, and independence of irrelevant coalitions

The division problem with maximal capacity constraints

We thank an anonymous referee whose comments and suggestions helped us to write a better paper. The work of G. Bergantiños is partially supported by research grant ECO2008-03484-C02-01 from the Spanish Ministry of Science and Innovation and FEDER. Support for the research of J. Massó was received through the prize "ICREA Acadèmia" for excellence in research, funded by the Generalitat de Catalunya. He also acknowledges the support of MOVE (where he is an affiliated researcher), of the Barcelona Graduate School of Economics (where he is an affiliated professor), and of the Government of Catalonia, through grant SGR2009-419. His work is also supported by the Spanish Ministry of Science and Innovation through grants ECO2008-04756 (Grupo Consolidado-C) and CONSOLIDER-INGENIO 2010 (CDS2006-00016). The work of A. Neme is partially supported by the Universidad Nacional de San Luis through grant 319502 and by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) through grant PICT-02114.The division problem consists of allocating a given amount of an homogeneous and perfectly divisible good among a group of agents with single-peaked preferences on the set of their potential shares. A rule proposes a vector of shares for each division problem. Most of the literature has implicitly assumed that all divisions are feasible. In this paper we consider the division problem when each agent has a maximal capacity due to an objective and verifiable feasibility constraint which imposes an upper bound on his share. Then each agent has a feasible interval of shares where his preferences are single-peaked. A rule has to propose to each agent a feasible share.We focus mainly on strategy-proof, efficient and consistent rules and provide alternative characterizations of the extension of the uniform rule that deals explicitly with agents' maximal capacity constraint

On Societies Choosing Social Outcomes, and their Memberships : Strategy-proofness

April 2017, Volume 48, Issue 4, pp 857-875The work of G. Bergantiños is partially supported by research Grants ECO2014-52616-R from the Spanish Ministry of Science and Competitiveness, GRC 2015/014 from "Xunta de Galicia", and 19320/PI/14 from " Fundaci ón Séneca de la Región de Murcia". J. Massó acknowledges financial support from the Spanish Ministry of Economy and Competitiveness, through the Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2015-0563) and Grant ECO2014-53051, and from the Generalitat de Catalunya, through Grant SGR2014-515. The paper was partly written while J. Massó was visiting the Department of Economics at Stanford University; he wishes to acknowledge its hospitality as well as financial support from the Ministerio de Educación, Cultura y Deporte through project PR2015-00408. The work of A. Neme is partially supported by the Universidad Nacional de San Luis, through Grant 319502, and by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), through Grant PIP 112-200801-00655.We consider a society whose members have to choose not only an outcome from a given set of outcomes but also the subset of agents that will remain members of the society. We assume that each agent is indifferent between any two alternatives (pairs of final societies and outcomes) provided that the agent does not belong to any of the two final societies, regardless of the chosen outcome. Under this preference domain restriction we characterize the class of all strategy-proof, unanimous and outsider independent rules as the family of all serial dictator rules

On societies choosing social outcomes, and their memberships: strategy-proofness

We consider a society whose members have to choose not only an outcome from a given set of outcomes but also the subset of agents that will remain members of the society. We assume that each agent is indifferent between any two alternatives (pairs of final societies and outcomes) provided that the agent does not belong to any of the two final societies, regardless of the chosen outcome. Under this preference domain restriction we characterize the class of all strategy-proof, unanimous and outsider independent rules as the family of all serial dictator rules.Fil: Bergantiños, Gustavo. Universidad de Vigo; EspañaFil: Massó, Jordi. Universitat Autònoma de Barcelona; EspañaFil: Neme, Alejandro José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis ; Argentin

Discussions around pre and post Hispanic subsistence systems in Mendoza province

El trabajo describe los principales avances y transformaciones que han tenido los estudios de subsistencia en la provincia de Mendoza a largo de los últimos 80 años. La descripción se centra principalmente en los aportes de la zooarqueología, la arqueobotánica y los isótopos estables, así como en la generación de información actualística. Se presenta una descripción del estado actual del conocimiento y se ensaya una síntesis acerca de la variabilidad adaptativa humana en relación con el tipo e intensidad de recursos explotados en escalas temporales y espaciales. Finalmente se discuten algunos desafíos que se abren al futuro acerca de las posibles líneas de trabajo y las aplicaciones de este conocimiento hacia otros ámbitos fuera de nuestra disciplina.This paper explores the main contributions and transformations that took place among the subsistence studies in Mendoza province during the last 80 years. It is focused in the zooarchaeological, archaeobotanical and stable isotopes contributions, as well as in the generation of actualistic information. A statement of the current knowledge is presented, as well as an essay about human adaptative variability in relation to the type and intensity of the exploited resources, both in temporal and spatial scales. Finally, some future challenges are discussed, related to the possible lines of work and the applications of this knowledge to other applications outside our discipline.Fil: Neme, Gustavo Adolfo. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentin

Mobility, procurement and use of obsidian in El Payen, south of the Province of Mendoza, Argentina

Las poblaciones humanas que ocuparon La Payunia en el Holoceno tardío, utilizaron obsidiana procedente de fuentes extra regionales del sur de la provincia de Mendoza, con una direccionalidad de traslado predominante oeste-este. En el presente trabajo se analiza la distribución espacial de artefactos de obsidiana de procedencia geográfica conocida en el área El Payén. Se evalúan las rutas de traslado, las estrategias de aprovisionamiento y las formas e intensidad de uso de dicho recurso, sobre la base de indicadores tecnológicos y biogeográficos. Los resultados obtenidos plantean que si bien la direccionalidad de traslado de obsidiana coincide con la planteada para la región (oeste-este), su frecuencia en los sitios disminuye de sur a norte. Asimismo, los nuevos datos muestran diferencias en el número de fuentes representadas y modos de aprovisionamiento y el uso de este recurso entre los sectores Centro Sur y Norte de El Payén.Human populations that occupied The Payunia during the late Holocene, used obsidian from outside sources, with predominant east-west directionality. In this paper we analyze the spatial distribution of obsidian artifacts from known geographical origin in El Payén. We investigate the possible transport routes, procurement strategies and forms and intensity of use of that resource, from the base of technological and biogeography indicators. The results suggest that although the directionality of movement of obsidian matches that proposed for the region (west-east), its frequency decreases from south to north. The results also show differences in the number of sources represented and the procurement modes and use of this resource among Central, South and North sectors of El Payén.Fil: Salgán, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla; ArgentinaFil: Gil, Adolfo Fabian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla; ArgentinaFil: Neme, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla | Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Museo de Historia Natural de San Rafael - Ianigla; Argentin