1,720,954 research outputs found
การทดสอบประสิทธิภาพภายในตลาด SET50 Index Options: ความแตกต่างระหว่าง Call Options กับ Put Options
Full text linkThis study is aimed to test the internal efficiency of SET50 Index Options market and focus on the difference between SET50 Index Call Options pricing relationship and SET50 Index Put Options pricing relationship using the conditions of Call & Put Spreads and Call & Put Butterfly Spreads. Over the sample period from October 29, 2012 through March 30, 2016, although the mispricing and arbitrage opportunities for SET50 Index Options are observed under the case of no transaction costs, there are not much opportunities, less than 11 percent. Even with modest transaction costs, including exchange fees, brokerage commissions, and opportunity cost of initial margin deposit, the frequency of arbitrage opportunities drops to less than 5 percent. Using bid and ask prices rather than closing prices, the arbitrageurs can earn riskless profit with SET50 Index Put Options trading only. With the existence of arbitrage opportunities, Put Spread generates more profit than Call Spread, but the mean sizes of violations for Call & Put Butterfly Spreads are not statistically different. Taking all transaction costs (exchange fees, brokerage commissions, interest on initial margin deposit, and bid-ask spread) into account, arbitrage opportunities in every case are almost eliminated. The SET50 Index Options market is therefore efficient. The result would boost the investors’ confidence to invest in options market
The beliefs in Karma and rebirth as motivation for charitable giving: A theoretical model
Full text linkThis paper proposes a two-period model with consumption/donation choices to explain how religious beliefs in karma and rebirth affect donation behavior. The first period corresponds to the present life, and the second period corresponds to the next life. Solving the model’s utility maximization problem shows how an individual allocates income toward donation to receive merit in the next life and how the amount of donation is affected by factors such as incomes, heterogeneity in karmic and rebirth beliefs, heterogeneity in warm-glow preferences, and cost of donation. In addition, this paper considers the role of donation tax allowance incentive in a warm glow model. The results of theoretical models show that charitable organizations can increase donations by (1) emphasizing karma believers (2) enhancing psychological benefits from donations (3) reducing costs associated with making donations and (4) promoting tax-deductibility of the charity
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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