1,720,960 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
The economic effects of transportation infrastructure on output and productivity
Full text linkThe overarching theme of this dissertation is the investigation of the relevance of transportation infrastructure for the development and performance of the private sector. I analyse this relationship for both firms located in developing and developed countries to highlight similarities and disparities of the importance of transportation networks for the performance of the firms. For the examination of this relationship, I have chosen two countries that differ substantially on various economic and social factors and their levels of transportation infrastructure: Colombia and Germany.
Research on developing countries is often limited by the absence of reliable panel data, this especially applies to data on firms. I propose the use of aggregated Colombian firm data to identify a pseudo-panel of manufacturing firms that can be used to simulate the analysis of firm-level effects. I provide further validity for this method by conducting a Monte Carlo simulation, which provides support for the appropriateness of pseudo-panels in the context of firm-level investigations and further highlights the particular suitability of different panel data estimation techniques for it. The identified pseudo-panel is employed for the subsequent analysis. The elasticity of highway infrastructure on the growth of a firm’s output is significant and positive, however the identified magnitude of this effect of ap- proximately 0.13 to 0.15 is substantially larger than the average effect identified in similar studies for developed countries, hence implying the crucial importance of transportation infrastructure for economic growth in developing countries. The results further show a time lag of this effect of one year, suggesting that firms’ production processes require time to adjust to the transportation infrastructure changes. These results are robust to the inclusion of additional controls and alternative transportation variables used. An additional investigation reveals thattransportation benefits particularly accrue to firms of the heavy industries. A further analysis highlights the role of transportation infrastructure within the context of spatial heterogeneity of this effect across regions. The results indicate the benefits of transportation infrastructure predominantly only accrue to firms located in relatively stronger regions with reported output elasticities of around 0.15. Additional analyses provide no support for the importance of transportation for fostering economic convergence in Colombia.
This thesis contains furthermore an examination of the role of the German highway network in influencing firm-level productivity patterns. This work uses German firm-level data and relies on the use of the Levinsohn-Petrin methodology and historical transportation data to conduct a two-step productivity estimation. I further derive two different transportation measurements to investigate the importance of transportation spillover effects. In line with previous studies of the German economic geography, I find spatial differences in productivity levels where larger levels are predominantly found in the districts of the South and West of the country, and lower productivity levels are identified throughout the Eastern districts. The investigation of the whole country identifies positive and significant productivity elasticities of highways where estimates range from 0.03 to 0.07 and 0.061 to 0.23 depending on the choice of method, controls and highway variable. This represents an increase of the firm’s productivity of 0.03 to 0.0.7 per cent following a 1 per cent increase in highways, or alternatively an increase of 0.061 to 0.23 when highway spillover effects are accounted for. This indicates that firms derive benefits from local highways and those located in the surrounding regions and the remainder of the country which points towards large spillover effects. The results further show that while highways are important for a firm’s productivity growth, alternative productivity enhancing factor, predominantly the amount to skilled labour, present relatively more important productivity determinants. The investigation of subsamples designed to capture districts with relatively high and low highway levels points towards diminishing returns of transportation infrastructure and satiation effects. While no consistent differences in the estimated effects could be identified across districts of the Eastern and Western states and for those districts which have recently received new highways under the “Transportation Projects German Unity”, further disaggregate results show that highways particularly benefited firms in rural districts in the West and those located in urban districts in the East. Overall, the robustness of the results of this chapter requires further analyses, however they tentatively point towards productivity enhancing benefits of transportation and additionally reveal a large degree of heterogeneity of this effect.Open Acces
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Full text linkWe 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
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