1,720,978 research outputs found
Sobre la no-positividad en redes de Markov discretas: una aplicación para el análisis de la pobreza multidimensional
Full text linkFil: Rodrigo, García Arancibia. Universidad Nacional del Litoral; Argentina.Fil: Rodrigo, García Arancibia. Vanderbilt University Medical Center; United State of America.Fil: Girela, Ignacio. Universidad Nacional de C órdoba. Facultad de Ciencias Económicas; Argentina.Fil: Girela, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Koplin, Eric. Vanderbilt University Medical Center; United State of America.El estudio aborda la estimación de redes de Markov discretas bajo ausencia de positividad, condición que frecuentemente se incumple en distribuciones socioeconómicas con ceros estructurales. Se propone una extensión de métodos previos que permite analizar conjuntos de independencias condicionales sin asumir positividad, asegurando la convergencia asintótica del grafo resultante. La metodología se aplica al análisis del Índice de Pobreza Multidimensional (IPM) en Ecuador y Guinea, utilizando indicadores del IPM global de OPHI-UNDP (2021). Los resultados muestran patrones diferenciales de asociación entre indicadores de salud, educación y estándares de vida, condicionados por variables como pobreza monetaria y localización urbana o rural. Este enfoque contribuye a mejorar la interpretación de las interdependencias entre dimensiones de la pobreza y a fortalecer la base empírica para la formulación de políticas públicas orientadas al desarrollo social.Fil: Rodrigo, García Arancibia. Universidad Nacional del Litoral; Argentina.Fil: Rodrigo, García Arancibia. Vanderbilt University Medical Center; United State of America.Fil: Girela, Ignacio. Universidad Nacional de C órdoba. Facultad de Ciencias Económicas; Argentina.Fil: Girela, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Koplin, Eric. Vanderbilt University Medical Center; United State of America
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
Elasticidades da Demanda Mundial de Lácteos Argentinos e seu Posicionamento Competitivo
Full text linkEl objetivo del presente trabajo es obtener funciones de demanda internacional de los principales lácteos exportados por la Argentina vis a vis con sus competidores. Con base en el enfoque teórico de Armington, se presenta un modelo para estudiar la demanda de los principales países importadores de leche en polvo y quesos argentinos en función del preciorelativo. Se asume, en primer lugar, las preferencias homotéticas, y se propone, luego, una extensión no homotética. Para su implementación empírica, se propone una especificación econométrica para datos de panel. El modelo es estimado utilizando modelos de efectos fijos (filtrado) y efectos aleatorios, con una estructura ar(1) para los errores. De los parámetrosestimados se obtiene la elasticidad de sustitución, la elasticidad -precio propia y cruzada en los mercados mundiales relevantes para la Argentina. Tales medidas constituyen una información valiosa para el conocimiento de la respuesta de los compradores mundiales ante diferentes medidas de política o shocks exógenos que pudieran alterar los precios relativos pagados por los importadores, como así también para analizar el posicionamiento de la Argentina en los mercados internacionales.The aim of this paper is to determine world demand for the main dairy products exported by Argentina vis-à-vis its competitors. Based on the Armington approach, a theoretical model is presented to study the import demand of major importing countries of Argentine milk powder and cheeses as a function of its relative price, extending the traditional homothetic ces specification to a non-homothetic version. For empirical implementation, an econometric specification for panel data is proposed. The model is estimated using filtered fixed effects and random effects models, with an ar(1) structure for idiosyncratic errors. Within the parameters of demand estimates, the elasticity of substitution is estimated as are own-price and cross-price elasticities. Such measures provide valuable information for understanding the response of the global demand to different policy measures or exogenous shocks that could alter the relative Argentine prices paid by importers, and therefore analyze the competitive position of Argentina in some international markets.O objetivo do presente trabalho és obter funções de demanda internacional dos principais lácteos exportados pela Argentina vis-à-vis seus competidores. Com base no enfoque teórico de Armington, se apresenta um modelo para estudar a demanda dos principais países importadores de leite em pó e queijos argentinos em função do preço relativo, assumindo em primeiro lugar preferencias homotéticas, propondo depois uma extensão não-homotética. Para a sua implementação empírica, propõe-se uma especificação econométrica para dados de painel. O modelo é estimado utilizando modelos de efeitos fixos e efeitos aleatórios, com uma estrutura ar(1) para os erros. Dos parâmetros estimados obtém-se a elasticidade de substituição, a elasticidade-preço própria e cruzada nos mercados mundiais relevantes para a Argentina. Tais medidas constituem uma informação valiosa para o conhecimento da resposta dos compradores mundiais ante diferentes medidas de política ou choques exógenos que puderam alterar os preços relativos pagados pelos importadores, como também assim para analisar o posicionamento da Argentina nos mercados internacionais
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Las aguas subterráneas y la tecnología de riego en el desarrollo agrícola de la provincia de San Juan
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