1,720,982 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
CDS-Bond Basis Dynamic and Credit Spread Price Discovery: A Test for European Corporate and Sovereign Bond Markets
Full text linkThis work analyzes the possible links between CDS premiums and bond spreads, with reference to both Eurozone sovereign and corporate markets, within the period 2011-2018. The main goal of this work is to provide more up-to-date results about the theoretical equivalence between the CDS premium and the credit spread of the underlying bond, and about the price discovery process of the credit risk between the CDS market and the bond market. While in theory, the so-called CDS-bond basis must tend to zero, the analyses on all the considered markets have shown that While, theoretically, the CDS-bond basis must tend to zero, the analysis on all the considered markets has shown that it results to be constantly away from parity and, more specifically, positive on average. The analysis of the price discovery process of the credit risk between the CDS market and the bond market, analyzed by means of the VAR and VECM models, confirms the leader role of bond spreads for almost all the analyzed entities. These evidence could be useful for arbitrageurs, who want to take advantage of potential market inefficiencies, and for regulators interested in guaranteeing the financial system stability through timely and correct inclusion of all available information in the security prices, avoiding any adverse selection issue
Dynamic Relationship of Commodities prices and EUR/USD exchange rate trends in the recent past
Full text linkGold and Oil have always had a central role within the international economy, and
meet the interests of many investors, and in particular, speculators. The Euro introduction
(1999) has added the Euro-Dollar exchange rate as a further main variable that the
operators, investing on these commodities, have to consider when implementing their
strategies. This paper analyzes the mutual relationship between commodities prices
(gold and oil) and the Euro/Dollar exchange rate, within the time frame from 2004 to
2014, so to find which specific variable can give significant information on the expected
variation of which other variable, and on which time horizon. This can support
the of investors’ choices on taking more effective speculative positions.
Results obtained by means of a VAR model show some significant statistical relationship
between the three variables on the short term (i.e. when considering daily data),
but also some possible relationship on a longer term (monthly data), suggesting that oil
prices can give significant information on the expected value of the Euro/Dollar exchange
rate
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
Dinamiche di pricing di oro, petrolio e tasso di cambio Euro/Dollaro nelle logiche operative di portafoglio
Full text link(GOLD, OIL AND EURO/DOLLAR EXCHANGE RATE LINKAGES: EMPIRICAL EVIDENCE FOR PORTFOLIO
ALLOCATION). Gold and oil have always had a central role within the international economy. Over the years, their prices have been
influenced by different events, especially during the financial crisis, which caused an excess of volatility in the relative markets. This
draw attention to many investors and, above all, speculators. The introduction of Euro, in 1999, added the Euro-Dollar exchange
rate as a further variable to consider when operators invest on these commodities. The aim of this paper is to analyse the mutual
relationship between gold and oil prices and the Euro-Dollar exchange rate in the time period 2004-2014. Possible links between
these variables could support also companies focused on the mining and processing of these commodities, and, in this way, support their
needs to hedge their positions. The study is carried out by means of a VAR (Vector Auto Regression) model. Results show some
significant statistical links between the three variables, both considering high frequency data (i.e. daily data) and low frequency data (i.e.
monthly data). Finally, the findings of the daily analysis suggest that oil prices can give significant info on the expected value of the
exchange rate, supporting market operators’ choices and their effective speculative strategies
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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