1,721,044 research outputs found
Oil price shocks and EMU sovereign yield spreads.
Full text linkThis study examines for the first time the relationship among the oil price shocks and the sovereign yield spreads in the EMU (which is collectively the largest oil-importer of the world), in a time-varying environment. In particular, we examine the timevarying correlation between oil price shocks and the 10-year sovereign yield spread of core and periphery countries in the EMU, by employing a scalar-BEKK framework. The main findings reveal that the correlations between sovereign yield spreads and oil price shocks are indeed time-varying and are influenced by specific economic and geopolitical events that took place during the study period. Furthermore, even though the correlation patterns are constantly low or zero prior to the Great Recession, a change is revealed in the post-2008 period, when correlations become moderate and more volatile. Finally, we do not observe noteworthy differences in the correlation behaviour between core and periphery countries to different oil price shocks. The findings of this study are particularly useful and provide valuable information to marketplace participants
The effects of oil price shocks on stock market volatility: Evidence from European data
Full text linkThe paper investigates the effects of oil price shocks on stock market volatility in Europe by focusing on three measures of volatility, i.e. the conditional, the realized and the implied volatility. The findings suggest that supply-side shocks and oil specific demand shocks do not affect volatility, whereas, oil price changes due to aggregate demand shocks lead to a reduction in stock market volatility. More specifically, the aggregate demand oil price shocks have a significant explanatory power on both current-and forward-looking volatilities. The results are qualitatively similar for the aggregate stock market volatility and the industrial sectors' volatilities. Finally, a robustness exercise using short-and long-run volatility models supports the findings
The WTI/Brent oil futures price differential and the globalisation-regionalisation hypothesis
No full textThis study examines the globalisation-regionalisation hypothesis in the WTI/Brent crude oil futures price differential by considering a set of potential determinants at 1, 3 and 6 months to maturity contracts. To this end, we employ monthly data over the period 1993:1-2016:12 for a set of crude oil-market specific (convenience yield, consumption, production) and oil-futures market specific (open interest, trading volume) determinants. Our results can be outlined as follows. First, the WTI/Brent convenience yield spread can drive a wedge between the WTI and Brent oil futures prices for the nearby month and 3-month contracts. Second, the WTI/Brent oil production spread is a significant determinant for the 1-month, 3-month and 6-month to maturity contracts, while the WTI/Brent oil consumption spread is significant for the 6-month contract. Third, the WTI/Brent open interest spread appears to influence the oil futures price variability between the WTI and Brent for the 3-month and 6-month contracts, while the WTI/Brent trading volume spread lends predictive power for the 1-month and 3-month contracts. Fourth, the oil futures market does not appear to be globalised in every time period. We provide evidence of a regionalised oil futures market over the short-run. Fifth, our robustness analysis lends support to the above findings. The findings of this study provide valuable information to energy investors, traders and hedgers
Fiscal policy, government size and EMU business cycle synchronisation
Full text linkWe provide new evidence on the effects of fiscal policy and government size on
pairwise business cycle synchronisation in EMU. A novel time-varying framework is
employed to estimate business cycle synchronisation and subsequently a panel approach is used
to establish the role of fiscal variables in determining the pairwise synchronisation observations
across time. The findings suggest similarities in the size of the public sector, yet divergence in
fiscal policy stance, matter for the determination of business cycle synchronisation. Hence,
increased fiscal federalism in EMU will contribute to increased business cycle synchronisation.
Our results remain robust to different specifications and sub-periods
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
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