1,720,979 research outputs found
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
Structured finance and the financial turmoil of 2007-2008 : an introductory overview
Get PDFThis paper provides an overview of the most important structured finance instruments in the context of the development of the financial turmoil that started in the third quarter of 2007 and continued into 2008. These financial market tensions were triggered by concerns about exposures of financial institutions to the most risky segment of the US mortgage markets -the so-called subprime mortgage market- and related financial instruments, which predominantly were related to structured finance. As structured finance has developed very fast in recent years and often involves highly complex financial instruments and techniques, which may not be understood completely beyond a small circle of financial market experts, the aim of this paper is to provide an introduction to these instruments that may serve to better understand the specific characteristics of the financial turmoil. In this context, the paper proposes a specific classification of structured finance and discusses both securitizations and credit derivatives with the aim of explaining their specific contributions to the development of the financial turmoil. To this extent, the paper differentiates between two main categories of structured finance instruments. The first one played an important role in the initiation and propagation of the turmoil and includes mortgage-backed securities (MBS), asset backed commercial paper (ABCP) and collateralized debt obligations (CDOs), both cash flow and synthetic. The second category of structured finance instruments involves those that have been more instrumental in monitoring the crisis, both for market participants and policymakers. The main instruments here are credit default swaps (CDS), of which examples are presented for both single name and index contracts. Finally, the paper provides an overview of the specific contagion channels involving various structured finance instrument
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
La financiación estructurada y las turbulencias financieras de 2007-2008 : introducción general
Get PDFEn este documento se presenta una introducción general a los instrumentos de financiación estructurada más importantes en el contexto de las turbulencias en los mercados financieros que comenzaron en el tercer trimestre de 2007 y que han continuado en 2008. Estas tensiones se desencadenaron por la inquietud suscitada acerca de las exposiciones de instituciones financieras al segmento de mayor riesgo de los mercados hipotecarios de Estados Unidos -el denominado mercado hipotecario subprime- y a instrumentos financieros relacionados, asociados en su mayor parte a la financiación estructurada. Dado que la financiación estructurada ha evolucionado con mucha rapidez en los últimos años y que con frecuencia conlleva la utilización de técnicas e instrumentos financieros de gran complejidad que pueden no ser entendidos completamente fuera de un círculo reducido de expertos en mercados financieros, este trabajo tiene por objeto proporcionar una introducción a estos instrumentos que puede servir para comprender mejor las características específicas de las turbulencias financieras. En este contexto, este documento propone una clasificación específica de los instrumentos de financiación estructurada y examina las titulizaciones y los derivados de crédito con el objeto de explicar sus contribuciones concretas al desarrollo de las perturbaciones financieras. A este respecto, el documento diferencia entre dos categorías principales de instrumentos de financiación estructurada. La primera, dominada por las técnicas de titulización, desempeñó un destacado papel en el desencadenamiento y la propagación de las turbulencias, e incluye los bonos de titulización hipotecaria (mortgage backed securities, MBS), los pagarés de empresa respaldados por activos (asset backed commercial paper, ABCP) y las obligaciones garantizadas por deuda (collateralized debt obligations, CDO) de flujo de caja (...
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
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