1,720,971 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
Une décision de crédit-bail peut aussi être un bon signal
No full textWithin a framework of information asymmetry, we study the informative content of a lease financing decision. The riskiest firms being most disposed to increase their economic risk, we show the rationality of a signalling equilibrium in which the firms of better quality voluntarily restrict their possibilities of substituting assets by privileging financing by leasing in relation to that by bank debt. We conclude that firms of good quality can signal themselves while using more leasing.
L'arbitrage coût-disponibilité du crédit et la concentration de la dette. Une approche en termes de contrats séparants
No full text[fre] Cet article présente un modèle des relations banques-entreprises en situation d'anti-sélection. L'asymétrie de l'information y est résolue par un double mécanisme : d'une part, les entreprises choisissent de diversifier plus ou moins leur approvisionnement en capitaux empruntés en nouant des relations avec un nombre donné d'établissements financiers ; les banques en infèrent alors une certaine information sur la qualité des débiteurs, ce qui permet d'aboutir à un équilibre semi-séparant ; d'autre part, les banques complètent la résolution de l'asymétrie de l'information en proposant des contrats séparants associant à un taux d'intérêt une probabilité de rationnement. Le modèle permet alors de relier les trois paramètres que sont la concentration de la dette, le coût et la disponibilité du crédit à une même caractéristique propre à chaque firme, son risque. En particulier, il est montré que les firmes les plus risquées choisissent de concentrer leur approvisionnement en capitaux empruntés. Les firmes moins risquées diversifient, quant à elles, leurs relations bancaires et limitent ainsi le risque de rationnement du crédit. Dans ce modèle, le rationnement est utilisé par les établissements financiers pour dissuader les entreprises de se faire passer pour moins risquées qu'elles ne sont en réalité. [eng] In this work, we built a model of bank-enterprise relationships in an adverse selection situation. The informational problem is resolved by a double device. First, firms choose the number of potential lenders, then banks deduce some information of debtors'quality, therefore, we obtain a semi-separating equilibrium. On the other hand, banks complete the solution of informational problem by using separating contracts where the separation is based on the pair (rate; likelihood of rationing). Then the model permits to link the debt concentration, the credit cost and the credit availability to the firm's risk. So, we show that more risky firms prefer fewer number of potential lenders. On the contrary, the fewer risky firms prefer more potential lenders: they limit the possibility of credit rationing.
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
L'arbitrage coût-disponibilité du crédit et la concentration de la dette. Une approche en termes de contrats séparants
No full textIn this work, we built a model of bank-enterprise relationships in an adverse selection situation. The informational problem is resolved by a double device. First, firms choose the number of potential lenders, then banks deduce some information of debtors?quality, therefore, we obtain a semi-separating equilibrium. On the other hand, banks complete the solution of informational problem by using separating contracts where the separation is based on the pair (rate; likelihood of rationing). Then the model permits to link the debt concentration, the credit cost and the credit availability to the firm?s risk. So, we show that more risky firms prefer fewer number of potential lenders. On the contrary, the fewer risky firms prefer more potential lenders: they limit the possibility of credit rationing. Classification JEL : G21
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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