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
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
Underemployment Rate
No full textUnderemployment generally refers to one of several situations that result in employment in an economically inadequate position. In this context the underemployment rate refers to the fraction of those employed who are “underemployed.” Some scholars utilize an alternative version of this definition by considering some nonemployed individuals as underemployed. Regardless of the definition of underemployment, the concept evolved from inadequacies in the unemployment rate in capturing work-related hardships
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
Social Security\u27s Earnings Test Penalty and the Employment Rates of Elderly Men Aged 65 to 69
Get PDFSocial Security provides retirement income to eligible elderly individuals who reach age 62 and apply for benefits. Beyond this age, some recipients continue to work on a full- or part-time basis. The Social Security Administration reduces the annual level of benefits for those recipients who have earnings above a specified amount known as the earnings test threshold. Effective in 1990, the earnings test penalty for a person aged 65 to 69 was reduced from 50 cents to 33 cents for every dollar earned in excess of the annually adjusted threshold. The labor supply response to the 1990 reduction in the earnings test penalty is an area that is mostly unexplored. This paper estimates non-parametric models that compare outcomes of a treatment group with various control groups. Clear evidence of the impact of the earnings test on behavior can be found among wage earners clustered near the threshold. This paper describes some of the theoretical expectations of employment and labor supply responses to the 1990 reduction in the earnings test penalty
Overeducation in the Labor Market: A Comment and Re-Analysis of a Meta-Analysis
No full textGroot and Maassen Groot and Maassen van den Brink (International Journal of Manpower 21, 584, 2000a) provide a useful summary of the incidence of overeducation and undereducation. Unfortunately, by combining non-compatible estimates of the impact of surplus schooling (and under schooling) on earnings they potentially bias their estimates downward (upward). This paper bypasses this potential bias by examining only wage estimates that use the “standard” required-surplus-deficit education model of Duncan and Hoffman (1981). The paper also expands the meta-analysis by including approximately 50 additional wage estimates. On average, the literature finds that the premium paid for overeducation is approximately equal to the penalty for undereducation, but lower than the returns associated with an increase in required education. Overeducated individuals earn more than their properly educated co-workers, but less than others with their level of schooling. The paper also examines how different definitions of required education impact the returns from overeducation and undereducation
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