1,721,024 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
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
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Essays in Health Economics
No full textThis dissertation consists of three chapters that relate to the following broad areas in health economics: care provision for vulnerable populations, challenges in efficient insurance market functioning and the value of continuity of care.
Chapter 1: The Impact of Federally Qualified Health Centers on Youth Outcomes.
Health events that occur in youth such as adolescent pregnancy often have an enormous impact on adult outcomes. Adolescents are generally well-covered by health insurance but may not have access to care for other reasons. Using the large and staggered geographic expansion of Federally Qualified Health Centers (FQHCs) in the last two decades, this paper studies the impact of these community-based providers on teen pregnancy rates and high school graduation rates. Openings are associated with a 10 percent drop in the teen birth rates in an area. Declines are larger in counties with more than one opening and among low-income populations. I find no statistically significant effect on educational attainment overall but a 17 percent decline in the proportion of women who did not complete high school in areas where FQHC openings had the largest effects on the teen birth rate. These findings highlight the potential of community-based institutions to impact opportunities for youth.
Chapter 2: Physician Handoffs and Patient Mortality
Transitions of patient care, or handoffs, have primarily been studied and associated with adverse events and errors among physician trainees. The relationship between handoffs and patient outcomes among physicians who have completed training is unknown, however, even though similar concerns apply outside the trainee setting. Using a 20% random sample of Medicare fee-for-service beneficiaries hospitalized during 2008-2012 and treated by a hospitalist, we analyzed whether patient 30-day mortality varied according to date of admission relative to the treating physician’s last working day. Admission towards the end of a physician’s shift block is predictive of a higher likelihood of handoff among otherwise similar patients, thus providing a setting for quasi-experimental analysis. We find that handoffs are associated with a 1.2 percentage point increase in 30-day mortality, with larger effects among high risk patients. This suggests a need for systematic measurement and evaluation of handoff processes within individual hospitals.
Chapter 3: The Extremely Under and Overcompensated in Individual Health Insurance Markets
This study seeks to investigate and describe the characteristics of individuals grossly underpaid and overpaid post risk adjustment and test the potential for adverse selection in the individual health insurance market. Using the 2016 HHS-HCC Risk Adjustment model software, we modeled risk-adjustment payments and analyzed residuals (the difference between payments and spending). Potential for supply-side and demand-side selection were explored through the measurement of the persistence of residuals and the correlation of individual expected spending and spending residuals, respectively. We found that the residual distribution is right-tailed but has a significant left tail as well and high spending variance HCCs are represented in both groups. Extreme residuals were highly persistent; the persistently underpaid spend disproportionately on specialty drugs while the persistently overpaid were frequently coded with transplant HCCs. The strong persistence of extreme residuals points to the potential for selection. Attention to the grossly over and underpaid individuals may lead to directions for improvement in plan payment systems. In addition, the role of specialty drugs in contributing to the persistence of residuals is worthy of more discussion.Health Polic
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Essays in Health Economics
No full textIn my dissertation, I study physician behavior and the role of physician styles. Chapter 1 establishes quasi-experimental evidence that physician styles (and not the sorting of patients) drive roughly 70% of variation in health care usage in U.S. Medicare after controlling for patient observables. The natural experiment relies on changes in the referral network of doctors for quasi-random assignment of patients to providers. Chapter 2 extends the investigation using the same natural experiment to study the effect of more health care on patient health. I find that more intensive medical care has minimal impact on patient mortality and hospitalization rates. However, I also show that patients who quasi-randomly receive more care initially also use more care in the longer-run as well. These two chapters establish that physician styles exist and that more intensive doctors do not appear to produce better patient outcomes. Chapter 3 studies how physician styles adapt to a negative income shock. In response to a nation-wide -5% change in Medicare reimbursement for physician services in 2002, doctors did not appear to dramatically adjust their behavior, suggesting no evidence of a short-run income effect by physicians.Economic
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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