1,720,981 research outputs found
(Group) Strategy-proofness and stability in many-to many marching markets
No full textWe study strategy-profness in many-to many matching markets. We prove that when firms have acyclical preferences over workers and both firms and workers have responsive preferences, the worker-optimal stable mechanism is group strategy-proof and Pareto optimal. Absent any assumption on workers’ references, an Adjusted Serial Dictatorship among workers is stable, group strategy-proof and Pareto optimal for workers. In both cases, the set of stable matchings is a singleton. We show that acyclicity is the minimal condition guaranteeing the existence of stable and strategy-proof mechanisms in many-to-many matching markets
Group strategy-proof stable mechanisms in priority-based resource allocation under multi-unit demand: a note
Full text linkIn this note we prove that group strategy-proofness and strategyproofness are equivalent
requirements on stable mechanisms in prioritybased resource allocation problems with
multi-unit demand.Both authors acknowledge financial support
from MEC under project ECO2014 57442 P and from Fondecyt under project No. 1151230. Romero-Medina acknowledges the financial support from the Ministerio Economía y Competitividad (Spain),
grants, MECD PR15/00306 and MDM 2014-0431. Triossi acknowledges the financial support from the
Institute for Research in Market Imperfections and Public Policy, ICM IS130002, Ministerio de Economía, Fomento y Turismo
Take-it-or-leave-it contracts in many-to-many matching markets
Full text linkWe study a class of sequential non-revelation mechanisms through which hospitals make simultaneous
take-it-or-leave-it offers to doctors. The inclusion of contracts shrinks the set of equilibrium outcomes
and harms doctors more than hospitals, but it maintains the stability of the set of equilibrium outcomes.
Our analysis reveals the existence of a first-mover advantage that is absent from the model without
contracts. The mechanisms of this class are outcome equivalent and implement the set of stable
allocations in subgame perfect equilibrium when enough competitive pressure is present. Equilibrium
outcomes form a lattice when preferences are substitutable.Both authors acknowledge financial support received from Ministerio Economía y Competitividad (Spain) under project
ECO2014_57442_P and from Fondecyt under project No. 1151230. Romero-Medina acknowledges financial support received
from Ministerio Economía y Competitividad (Spain) PR15/00306 and MDM 2014-0431, and Comunidad de Madrid, MadEco-CM
(S2015/HUM-3444), and Triossi acknowledges financial support received from the Institute for Research in Market Imperfections
and Public Policy, ICM IS130002, Ministerio de Economía, Fomento y Turismo [Chile]. We thank Atila Abdulkadiroğlu, José Alcalde,
Luis Corchón, Umut Dur, Lars Ehlers, Hideo Konishi, Thayer Morrill, Alejandro Neme, Jorge Oviedo, Tayfun Sönmez, Bertan
Turhan, Utkun Ünver, and Yosuke Yasuda for their helpful comments. Triossi acknowledges the hospitality of Collegio Carlo
Alberto, and Romero-Medina acknowledges the hospitality of Boston College afforded while writing this paper
Two-sided strategy-proofness in many-to-many matching markets
Full text linkWe study the existence of group strategy-proof stable rules in many to-many matching markets. We show that when firms have acyclical preferences over workers the set of stable matchings is a singleton, and the worker-optimal stable mechanism is a stable and group strategy-proof rule for firms and workers. Furthermore, acyclicity is the minimal condition guaranteeing the existence of stable and strategy-proof mechanisms in many-to-many matching markets.Both authors acknowledge financial support from Ministerio Economía y Competitividad
(Spain) under project ECO2014 57442 P and from Fondecyt under project No. 1151230. Romero-Medina acknowledges the financial support from
Ministerio Economía y Competitividad (Spain) MDM 2014-0431, and Comunidad
de Madrid, MadEco-CM (S2015/HUM-3444) and Triossi acknowledges
the financial support from the Institute for Research in Market Imperfections
and Public Policy, ICM IS130002, Ministerio de Economía, Fomento y Turismo.
Triossi acknowledges the hospitality of Collegio Carlo Alberto while writing this
paper
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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