1,720,998 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
Three Essays in Health Economics
No full textHuman papillomavirus (HPV) is the most common sexually transmitted infection in the United States and the single biggest cause of cervical cancer, as well as certain cancers of the head and throat, anus, vulva, vagina, and penis. Between 2008 and 2012 nearly 40,000 people annually were diagnosed with an HPV-related cancer. Despite these staggering numbers and the existence of a highly effective vaccine, HPV vaccination rates remain low. In the first chapter, I study how the structure of school mandate opt-outs can affect vaccine take-up. I show that Washington, DC’s movement from a one-time opt-out provision to an annual requirement increased the probability that teen girls were vaccinated against HPV by 11 percentage points. Teen boys were 20 percentage points more likely to be vaccinated. In the second chapter, I show that state Medicaid expansions as part of the Affordable Care Act (ACA) were associated with a 3-4 percentage point increase in the probability that teens initiated the HPV vaccine. This relationship appears to have been driven in part by increases in Medicaid coverage, the probability of having a recent check-up, and knowledge about the HPV vaccine. Supporting this pathway, I show that Medicaid expansion states saw increased Google searches for “pediatrician,” “Gardasil” (a trade name of the HPV vaccine), and “HPV Cancer.” Because teen insurance eligibility was largely unaffected by the ACA Medicaid expansions, this chapter highlights the importance of parental engagement with the health care system in affecting teen health behaviors and outcomes. Finally, in the third chapter, I study state policies requiring employers to electronically verify (E-Verify) the work eligibility of their new hires. I show that state E-Verify mandates were associated with a 5-percentage point reduction in the probability that likely-unauthorized immigrants were employed and a 2-percentage point reduction in the probability that they had employer-sponsored insurance. However, these changes appear to have been mitigated by selective outmigration of otherwise unemployed and uninsured likely-unauthorized immigrants
Essays in Health and Applied Microeconomics
No full textChapter 1 of this dissertation is titled “Social Security Eligibility and Healthcare Utilization: Evidence from Administrative Data”. I estimate the impact of Social Security receipt and retirement on healthcare utilization by exploiting the discontinuous increase in claiming and labor market exit at the Early Eligibility Age of 62. Using administrative data on several types of healthcare encounters from New York and California, I find a discontinuous increase in emergency department (ED) visits that do not result in hospitalization by 1-2% at this age.
Chapter 2 is titled “How Access to Addictive Drugs Affects the Supply of Substance Abuse Treatment: Evidence from Medicare Part D”. This paper documents that substance abuse treatment (SAT) providers and services respond to increases in population-level opioid addiction. I do this by exploiting the implementation of Medicare Part D as an exogenous increase in the availability of prescription opioids. Starting in 2006, states with higher shares of the population eligible for Medicare Part D experienced increases in residential and hospital inpatient SAT facilities, beds dedicated to SAT, and SAT facilities offering medication-assisted treatment, relative to states with lower shares. These results suggest that the supply of SAT in the United States is capable of responding significantly to changes in demand.
Chapter 3 is titled “A fine predicament: Conditioning, compliance and consequences in a labeled cash transfer program” and is authored jointly with Carolyn J. Heinrich. We study the unintended consequences of conditional cash transfers (CCTs), in which conditions are monitored and enforced, versus labeled cash transfers (LCTs), in which conditions are not monitored or enforced. Households in the Kenya Cash Transfer Programme for Orphans and Vulnerable Children (CT-OVC) were randomized to received either a CCT or LCT and outcomes were evaluated after two years of transfer receipt. We find that CCT and LCT households display similar conditioned-upon outcomes at endline, but the poorest CCT households at baseline reported lower non-food consumption at endline than the poorest LCT households. This suggests that, in comparison to LCTs, CCTs may produce unintended, regressive policy effects for the most vulnerable participants
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
Essays in LGBTQ+ Economics
No full textThis dissertation explores the intersections of gender identity, sexual orientation, and economic outcomes through three empirical essays that examine the effects of policy and identity on labor markets, household dynamics, and well-being. Using large-scale, nationally representative data from the United States and Latin America, each chapter offers new evidence on the economic experiences of sexual and gender minorities—populations historically underrepresented in economic research. The first chapter investigates the repeal of “Don’t Ask, Don’t Tell” (DADT) and its impact on same-sex partnership formation and economic outcomes among U.S. military personnel and their families. Leveraging the exogenous policy change and using a difference-in-differences framework, the analysis reveals that the repeal significantly increased partnership formation among women in the military and improved health insurance coverage for their civilian partners. The second chapter shifts focus to Latin America and provides the first nationally representative estimates of labor market and socioeconomic disparities for non-cisgender individuals in the region. Using Chilean survey data, the paper documents significant employment gaps and poverty disparities by gender identity, highlighting the economic marginalization faced by gender minorities in developing country contexts. The third chapter turns to the U.S. and uses new data from the Household Pulse Survey to quantify the economic vulnerabilities of transgender and gender-diverse individuals. The findings show marked disparities in employment, poverty, health insurance coverage, and food insecurity—especially for non-cisgender Black individuals—underscoring the compounded effects of gender identity and race. Together, these essays provide new evidence on the role of policy, identity, and structural inequality in shaping the economic lives of LGBTQ+ populations. The findings contribute to ongoing debates in labor economics, public policy, and the economics of discrimination, and offer empirical foundations for more inclusive policy design
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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