1,721,443 research outputs found
The new product portfolio innovativeness–stock returns relationship: the role of large individual investors’ culture
No full textThe marketing–finance interface literature has investigated the direct link between innovativeness and stock returns. The authors extend this research by focusing on two open questions: How and under what conditions is innovativeness associated with stock returns? Answering these questions is important for managers who have to defend innovation investments to board members and time the introductions of new products. The authors investigate large individual investors and their national culture in the food and beverage industry. Combining multiple data sets, they first examine the relationship between innovativeness and large individual investors’ stock holding decisions (i.e., to sell, hold onto, or buy a firm’s stocks). The results indicate that national culture moderates this relationship. At the firm level, the authors show that large investors’ stock holding partially mediates the innovativeness–stock returns relationship and that the culture of a firm’s large investors moderates this mediated relationship. Thus, they unveil a special segment of investors, large individual investors, who influence the extent to which firms benefit from innovativeness in the stock market in the food and beverage industry
Carbon isotopic (13C and 14C) composition of synthetic estrogens and progestogens
Full text linkAuthor Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Rapid Communications in Mass Spectrometry 26 (2012): 2619–2626, doi:10.1002/rcm.6385.Steroids are potent hormones that are found in many environments. Yet, contributions from
synthetic and endogenous sources are largely uncharacterized. The goal of this study was to
evaluate whether carbon isotopes could be used to distinguish between synthetic and endogenous
steroids in wastewater and other environmental matrices. Estrogens and progestogens were isolated from oral contraceptive pills using semi-preparative
liquid chromatography/diode array detection (LC/DAD). Compound purity was confirmed by
gas chromatography-flame ionization detection (GC-FID), gas chromatography/time-of-flight
mass spectrometry (GC/TOF-MS) and liquid chromatography/mass spectrometry using negative
electrospray ionization (LC/ESI-MS). 13C content was determined by gas
chromatography/isotope ratio mass spectrometry (GC/IRMS) and 14C was measured by
accelerator mass spectrometry (AMS). Synthetic estrogens and progestogens are 13C depleted (δ13Cestrogen = -30.0 ± 0.9 ‰; δ13Cprogestogen
= -30.3 ± 2.6 ‰) compared to endogenous hormones (δ13C ~ -16 ‰ to -26 ‰). The 14C content
of the majority of synthetic hormones is consistent with synthesis from C3 plant-based
precursors, amended with “fossil” carbon in the case of EE2 and norethindrone acetate.
Exceptions are progestogens that contain an ethyl group at carbon position 13 and have entirely
“fossil” 14C signatures. Carbon isotope measurements have the potential to distinguish between synthetic and
endogenous hormones in the environment. Our results suggest that 13C could be used to
discriminate endogenous from synthetic estrogens in animal waste, wastewater effluent, and
natural waters. In contrast, 13C and 14C together may prove useful for tracking synthetic
progestogens.This work was supported by the Martin
Family Society of Fellows for Sustainability and by a U.S. Environmental Protection Agency
STAR graduate fellowship (FP-91713401)
2017 Making Literature Conference
Full text linkKeynote Speakers: Tom Noyes, Shari Wagner, Grace Tiffany, Jessica Mesman Griffith, David Griffit
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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