1,721,347 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
Comportements alimentaires des mères et des enfants : Intranet INRA > Portail actus > Entreprises, monde agricole > Résultats, innovation, transfert > Toutes les actualités > Comportements alimentaires
No full textEn mesurant, par des méthodes expérimentales, les choix alimentaires des mères et de leurs enfants, les chercheurs définissent des typologies de comportements. Ces études peuvent éclairer les politiques publiques sur la nutrition.
Les méthodes d’économie expérimentale permettent d’étudier les comportements des consommateurs, ainsi que les impacts de certaines interventions publiques. Les expérimentations en laboratoire présentent deux avantages importants par rapport aux autres méthodes d’étude des comportements : les choix des participants sont précisément observés et l’information donnée aux consommateurs est maîtrisée par les expérimentateurs. (...
The strategy of one firm offering a new product with willingness to pay elicited in the lab
No full textThis study analyzes the strategy of one firm offering a new product with willingness to pay (WTP) for the usual and new products elicited in the lab. By using WTP from an experiment, surpluses for consumers choosing between the usual and new products are inferred and lead to an estimated demand for the new product. From this demand, the author shows how to estimate the ex ante price of the new product along with the ex ante level of advertising selected by one firm for informing consumers. The socially optimal level of advertising maximizing the welfare is also determined. The previous methodology is applied to two experiments with food. For a same-advertising formula regarding information diffusion to consumers, the estimated levels of advertising highly differ between these two experiments because of different WTP variations linked to the new product.Cette étude analyse la stratégie d'une entreprise offrant un nouveau produit en utilisant les consentements à payer (CAP) pour des produits existants et pour des nouveaux produits. En utilisant les CAP déterminés avec une expérience de laboratoire, les gains des consommateurs et la demande pour le nouveau produit sont estimés. A partir de cette demande, l'auteur montre comment estimer ex ante le prix du nouveau produit et le niveau de publicité choisi par une entreprise. La méthode précédente est appliquée à deux expériences de laboratoire utilisant des produits alimentaires. L'auteur montre que le niveau de publicité choisi par la firme diffère beaucoup entre les deux expériences, en raison de la forte différence des CAP liés au nouveau produit et déterminés dans chaque expérience
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
Prix négocié et prix affiché avec anti-sélection
No full textCahier de Grignon ; 95/02Egalement publié en anglais Diffusion du document : INRA Station d'Economie et Sociologie rurales INA Paris-Grignon 78850 Thiverval Grignon (FRA)National audienceCette communication analyse dans un modèle de recherche, le choix endogène de mécanisme de prix en présence d'asymétrie d'information sur la qualité des produits entre acheteurs et vendeurs. L'auteur reprend dans un contexte d'anti-sélection le cadre d'analyse déjà exposé par Bester (1993) qui considérait un cas de risque moral. Sur un marché différencié de façon verticale, les vendeurs ont le choix entre deux mécanismes de prix : un prix négocié et un prix affiché. Les acheteurs quant à eux découvrent la qualité au moment de leur visite chez les vendeurs. Avec le mécanisme de prix négocié, l'analyse met en évidence différentes stratégies de recherche des acheteurs. A la différence du prix négocié, le prix affiché permet de fournir de l'information capable de signaler la qualité. On montre alors l'existence et l'unicité d'un équilibre séparateur. Enfin, la concurrence entre vendeurs dans le choix de ces deux mécanismes est analysée
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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