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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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Relationship between the structure of ownership and computing the accounting profits in the Brazilian market
No full textEste estudo objetivou investigar a influência da estrutura de propriedade sobre a informatividade dos lucros contábeis divulgados pelas empresas negociadas no mercado acionário brasileiro. Foi considerada como informatividade a intensidade da relação entre o lucro contábil e o retorno das ações, mensurada pelo coeficiente angular da reta estimada entre essas duas variáveis. A pesquisa teve como foco a influência específica de duas características da estrutura de propriedade: a concentração dos votos e a divergência entre os direitos das ações (voto versus fluxo de caixa) sobre a informatividade dos lucros contábeis. Tendo em vista a realidade do mercado brasileiro, a pesquisa considerou a adoção das práticas diferenciadas de governança corporativa como mecanismo redutor da influência da concentração de votos e da divergência entre direitos sobre a informatividade dos lucros contábeis. Adicionalmente, a pesquisa abordou a diferença da informatividade entre o lucro contábil e o dividendo, provocada pela divergência entre os direitos das ações (voto versus fluxo de caixa). A importância deste estudo, no ambiente brasileiro, encontra-se no fato de o mercado brasileiro, diferente dos mercados desenvolvidos, ser caracterizado por uma forte concentração dos votos nas mãos de poucos acionistas e pelo desvio entre os direitos de voto e fluxo de caixa por intermédio da emissão de ações preferenciais. A relação entre a informatividade dos lucros contábeis e a concentração de votos e a divergência entre direitos foi fundamentada pelo efeito entrincheiramento e pelo efeito alinhamento. A metodologia adotada foi baseada na utilizada nos estudos de Fan e Wong (2002) e Francis et. al. (2005) desenvolvidos, respectivamente, no mercado do sudoeste asiático e no mercado americano. Utilizou-se a definição do maior acionista controlador. A amostra utilizada na pesquisa foi formada pelas empresas não-financeiras listadas na Bolsa de Valores de São Paulo (Bovespa) durante o período de 2000 a 2006. Como a amostra de trabalho selecionada apresenta características de um painel desbalanceado, os modelos adotados foram estimados em três abordagens: Pooled, Efeitos Fixos e Efeitos Aleatórios. Os resultados encontrados indicam que a concentração dos votos exerce uma influência negativa sobre a informatividade dos lucros contábeis. Quanto à divergência entre direitos, a influência negativa foi confirmada parcialmente. Diferente do resultado esperado, a divergência entre direitos exerce influência positiva sobre a informatividade dos lucros contábeis. Quando a divergência entre direitos passa a ser observada em conjunto com o excesso de votos, verifica-se a sua influência negativa sobre a informatividade dos lucros contábeis. Essa evidência sugere que a divergência entre os direitos passa a influenciar negativamente a informatividade somente quando o maior acionista controlador possui a maioria (>50%) dos votos. O maior impacto negativo sobre a informatividade dos lucros contábeis foi observado quando ocorre a combinação da concentração de votos com a divergência entre direitos. Sobre a adoção de práticas diferenciadas de governança corporativa, não foi confirmado o seu papel como elemento redutor da influência da concentração de votos e da divergência entre direitos sobre a informatividade dos lucros contábeis. Em relação à comparação da informatividade dos lucros contábeis e dos dividendos, foram levantadas as seguintes evidências: (i) quando condicionadas a divergência entre direitos, foi observada a diferença estatística entre as informatividades dos lucros contábeis e a dos dividendos, e (ii) ao contrário do esperado, sob a influência da divergência entre direitos, a informatividade dos lucros contábeis aumenta e à dos dividendos diminui.This present study consists on examining the effects of the ownership structure over the informativeness of the accounting earnings which are disclosed by traded companies in the Brazilian stock market. Informativeness is about measuring how intense is the relation between accounting earnings and stock prices considering the angular coefficient of the probable straight line between these two variables. The research focus on the specific influence of two ownership structure´s characteristics: the concentration of the vote rights and the divergence between the rights of the shares (vote versus cash flow) on the accounting earnings informativeness. Analyzing the Brazilian market, this study considerate the use of the different practices of corporative governance to reduce the influence of the concentration of vote rights and the divergence between rights on the accounting earnings informativeness. It also approaches the difference of the informativeness between accounting earnings and dividends, caused by the divergence between the rights of the shares (vote versus cash flow). The relevance of this study, in the Brazilian reality, meets in the fact that the Brazilian market, different from other developed markets, is the typical concentration of the vote rights at the hands of a few shareholders, plus the deviation between the rights to vote and cash flow through emission of preferential shares. The relation between the informativeness of the accounting earnings and the concentration of votes and the divergence among rights was based on the entrenchment and the alignment effects. Its methodology was based on the studies made by Fan and Wong (2002) and Francis et. al. (2005) in Asian southwestern market and the American market. The definition of the largest ultimate owner was used. The sample used in the research was formed by the no-financial companies listed in the São Paulo Stock Exchange (Bovespa) during the years of 2000 the 2006. There were three approaches: pooled, fixed effect and random effect. The results show that the concentration of the vote rights has a negative influence on the accounting earnings informativeness. Concerning the divergence between rights, the negative influence was confirmed partially. However, as an unexpected result, the divergence between rights has positive influence on the accounting earnings informativeness. When the divergence between rights is taken into consideration within the excess of votes, it becomes clear its negative influence over the accounting earnings informativeness. This evidence suggests that the divergence among rights can influence negatively the informativeness only when the largest ultimate owner has the majority (>50%) of the vote rights. The most negative impact on the accounting earnings informativeness was observed when the combination of the concentration of votes with the divergence between rights occurs. Concerning the different practices of corporative governance as the reducing element of the influence of the concentration of votes and the divergence between rights over the accounting earnings informativeness, it was not confirmed. At last, comparing informativeness of accounting earnings and dividends, evidences emerged: (i) when the divergence for rights were conditioned, there was a difference in statistics between informativeness of accounting earnings and dividends, and (ii) whereas, unexpectedally, under the influence of the divergence within rights, accounting earnings informativeness increased and informativeness dividends decreased
A influência da estrutura de propriedade sobre a informatividade dos lucros contábeis divulgados pelas empresas negociadas na Bovespa
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