1,720,966 research outputs found
Una estimación del número de grupos sociales en la población Argentina
Get PDFFil: Callorda, Fernando Martin. Universidad de San Andrés. Departamento de Economía; Argentina.El objetivo de este trabajo es estimar de manera endógena el número de
grupos sociales dentro de la población argentina, tanto a nivel nacional como para
cada una de sus regiones. Por lo que en base a lo realizado por Ferro Luzzi et al.
(2006) y en Caruso (2008); y en función de las dimensiones de la pobreza que
pueden analizarse a partir de la EPHC destacadas por Conconi y Ham (2007); se
divide a la población en k clusters a través del método de k medias.
Posteriormente, para determinar el número óptimo de grupos, se utiliza la
metodología de “cluster stop” de Calinski y Harabasz (1974).
Los resultados indican que el número de grupos fluctúa entre dos y tres, en
función de las características analizadas y para el período que va desde el año 2004
al 2007, sin presentar estabilidad en el tiempo o a nivel sub nacional
Efectos económicos de corto y mediano plazo del despliegue de la banda ancha en Ecuador
Get PDFFil: Callorda, Fernando Martin. Universidad de San Andrés. Departamento de Economía; Argentina.En este trabajo se amplía el análisis de Katz y Callorda (2013), en el que estiman el impacto económico resultante del despliegue del servicio de banda ancha en Ecuador a partir de la información disponible en los micro datos de la Encuesta Nacional de Hogares entre los años 2009 y 2011. El objetivo de la investigación es analizar si los efectos encontrados en el corto plazo son similares a los correspondientes al mediano plazo (2013). Este análisis encuentra que el impacto de mediano plazo es similar al del corto plazo. Una posible interpretación a estos resultados indica que el principal impacto de la adopción de la banda ancha en la economía se da a través de la inversión en infraestructura para el despliegue de la tecnología y por una mejora de productividad de los primeros adoptantes. En cambio, en los adoptantes tardíos del servicio no se encuentra evidencia para indicar que existe un impacto económico positivo por el uso de la banda ancha.This paper expands the analysis of Katz and Callorda (2013), in which they estimate the economic impact resulting from the deployment of the broadband service in Ecuador from the information available in the micro-data of the National Household Survey among the years 2009 and 2011. The objective of the research is to analyze if the effects found in the short term are similar to those corresponding to the medium term (2013). This analysis finds that the medium-term impact is similar to that of the short term. A possible interpretation to these results indicates that the main impact of the adoption of broadband in the economy occurs through investment in infrastructure for the deployment of technology and by an improvement in productivity of early adopters. In contrast, late adopters of the service do not find evidence to indicate that there is a positive economic impact from the use of broadband
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Determinantes de la adopción de las tecnologías de la información y la comunicación en Argentina en el 2011
No full textFil: Karapetian, Edgar. Universidad de San Andrés. Departamento de Economía; Argentina.El objetivo de este trabajo es describir la situación de la argentina en relación a la adopción de las Tecnologías de la Información y la Comunicación (TIC), a partir de los microdatos de la Encuesta Permanente de Hogares al tercer trimestre del 2011. A su vez, se compara la situación de Argentina en relación a lo que acontece en otros países de la región como Brasil, Chile, Colombia, Ecuador y Uruguay. Este análisis concluye que en Argentina los principales determinantes que determinan la adopción de las TIC son el nivel de educación, el nivel de ingresos y la región donde vive el individuo. Así también, se encuentra que Argentina tiene un retraso relativo en la adopción de las nuevas tecnologías, lo que le impide generar un potencial impacto en producto y empleo
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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
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