1,721,029 research outputs found
A discrete choice approach to model credit card fraud
No full textThis paper analyzes the demographic, socio-economic and banking-specific determinants that influence the risk of
fraud in a portfolio of credit cards. The study is based on a large banking portfolio and is the first to analyze the
statistical significance of the determinants of credit card fraud in Italy. A logit framework is employed that incorporates
cards at a risk of fraud as the dependent variable and a set of control variables (e.g., gender, location, credit line,
number of transactions in euros and in non-euros currency). The empirical results provide useful indicators on the
factors that are responsible for potential risk of fraud. Over all, the riskier categories are women, customers residing in
the Center of Italy, those who own a II circuit credit card and secondary owners
PIANO ECONOMICO SOCIALE DEL PARCO DI PORTO CONTE
No full textValuazione di piano del Parco regionale di Porto Conte (Alghero) per quelli che sono gli aspetti economici e sociali
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
An investigation into the relationship between size and efficiency of the Italian hospitality sector: a window DEA approach
No full textThis paper analyses the efficiency of hotels across all of the 20 regions in Italy using a data envelopment analysis (DEA). The empirical results indicate that Sardinia can be considered as a region "falling further behind", whereas some regions in the North and Centre of Italy can be regarded as "moving ahead". Using the island of Sardinia as a case study, approximately 150 firms are analysed in detail over the time span 2002-2005. Via a window DEA, both technical and scale efficiencies are computed. An efficiency comparison amongst hotels categorised by size and municipality is run. Finally, policy implications are drawn from the empirical findings that advise how to improve hotels that attained low efficiency scores
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
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