1,721,031 research outputs found
Firm size, age, industrial networking, and growth: a case of the Korean manufacturing industry
No full textFirm growth, Industrial networking, Subcontracting, Clustering, Korean manufacturing industry, L14, L25, L26, L52, L60, O25,
Mixing versus sorting in schooling: Evidence from the Equalization Policy in South Korea
No full textThis paper employs the difference-in-differences empirical strategy and quantile regressions to analyze the effects of sorting and mixing on the academic performance of high school students in South Korea. In Korea, about half of high schools are subject to the equalization policy (EP), and must therefore passively accept students randomly assigned to them. On the other hand, about half of high schools are in non-EP areas, so students are sorted among schools based on students' ability levels. Two main results emerge from this study. First, sorting raises test scores of students outside the EP areas by roughly 0.3 standard deviations, relative to mixing. Second, more surprisingly, quantile regression results reveal that sorting helps students above the median in the ability distribution, and does no harm to those below the median. © 2008 Elsevier Ltd. All rights reserved.1
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
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
Determinantes de la demanda de agua en las áreas urbanas marginadas en Lima-Perú y su importancia en la mejora del bienestar social
Get PDFEsta investigación estudia parte del mercado del agua de áreas urbanas marginadas en
Lima-Perú, donde la compañía de agua de Lima no proporciona agua potable a los hogares con tuberías. Ante esto, los consumidores de áreas marginadas pagan precios más altos por los servicios de camiones cisterna que los consumidores de la compañía de agua de Lima. Por lo tanto, los principales propósitos de este estudio son: (1) identificar los determinantes de la demanda de agua mediante una regresión de variables instrumentales, y (2) saber cómo cambia el bienestar social cuando varía el precio del agua. Para medir este cambio, se utilizan conceptos como excedente del consumidor, excedente del productor, variación equivalente y variación compensatoria. Se usan datos de la encuesta realizada por Direct Marketing Research and Consulting, y la Superintendencia Nacional de Servicios de Saneamiento del Perú (SUNASS). Finalmente, los resultados sugieren que el consumo de agua depende significativamente del precio del agua, el número de personas por hogar, la capacidad de almacenamiento de agua que tiene cada hogar y el nivel de ingresos. Del mismo modo, se ha descubierto que existe una fuerte relación negativa entre el precio del agua y el bienestar social; por lo tanto, se recomiendan encarecidamente las políticas públicas para regular el nivel del precio del agua.This research studies part of the water market from marginalized urban areas in
Lima-Peru, where households are not provided potable water service with pipes by the
Lima water company. Given this, consumers of marginalized areas pay higher prices from
tank trucks services than consumers of the Lima water company. Therefore, the main
purposes of this study are: (1) to identify the determinants of water demand using an
instrumental variable regression, and (2) to know how social welfare changes when water
price varies. For measuring this change, I use concepts such as consumer surplus,
producer surplus, equivalent variation and compensating variation. I use data from the
survey conducted by the Direct Marketing Research and Consulting, and the National
Superintendence of Sanitation Services of Peru (SUNASS). Finally, the results suggest
that consumption of water depends significantly on water price, number of people per
household, the storage capacity of water that each household has and the level of income.
Likewise, we found out that there is a strong negative relation between water price and
social welfare; thus, public policies to regulate the level of water price are strongly
recommended.Corea del Sur. Korea-LAC Scholarship Program (KLSP) / BIDTesi
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