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Testing causal relation among central and eastern European equity markets: evidence from asymmetric causality test
No full textThe aim of this study is to analyse the presence of a causal link among financial markets of Central and Eastern Europe (CEE) countries by adopting an asymmetric causality test. The standard causality test results suggest a causal relation running from the Czech Republic to Poland. Also, the Poland stock market is found to be a Granger cause of Turkey stock markets. Asymmetric causality test results indicate only a causal link going from the Czech Republic to Hungary and Poland. In addition, the presence of financial integration between Germany and CEE equity markets cannot be determined
İstanbul Menkul Kıymetler Borsası’nda etkin piyasa hipotezinin uzun hafıza modelleri ile analizi: sektörel bazda bir inceleme
Get PDFIn this study, we examine whether the efficient market hypothesis is valid in the Istanbul Stock Exchange (ISE) via parametric and semi parametric long memory models. In order to determine the presence of weak form efficient market hypothesis, we consider 10 sector indices. Semi parametric and parametric long memory model results suggest that the volatility of sector returns exhibit long memory properties and hence it can be said that the ISE is not efficient market
SPOT VE VADELİ İŞLEM FİYATLARININ VARYANSLARI ARASINDAKİ NEDENSELLİK TESTİ
Get PDFVolatility in financial markets urges importance of risk management with respect to investors and especially firms. Information and interaction between spot and futures markets plays an important role on formation of market prices. In this study, causality and information flows are examined on spot and futures prices of ISE 100 Index, US Dollar, and Euro which are traded at Turkish Derivatives Exchange (VOB). Dynamic causality test that is originally created by Cheung and Ng (1996) is applied. Dynamic causality test results show that in the ISE 100 Index model spot prices affect futures prices and in the exchange model futures prices affect spot prices
Testing intraday volatility spillovers in Turkish capital markets: evidence from ISE
Get PDFThe aim of this article is to examine the presence of volatility transmission between futures index and underlying stock index by using intraday data in Turkey. We first examined the sudden changes in the variance of futures index return and the underlying spot index return. Then we employed the causality in the variance tests proposed by Hong (2001) and Hafner and Herwartz (2006). According to the empirical results, the spot market was found to be Granger cause of futures market and this result suggests that the spot market plays a more dominant role in the price discovery process in Turkey
Volatilitede uzun hafıza ve yapısal kırılma: Borsa Istanbul örneği
Get PDFThe aim of this paper is to examine validity of the efficient market hypothesis in Borsa İstanbul. Daily returns series are calculated by using daily closing price for BİST100 and BİST30 indices for periods of 1988-2014 and the presence of long memory on the volatility of the returns series is examined by means of Adaptive-FIGARCH (A-FIGARCH) model proposed by Baillie and Morana (2009). Empirical results suggest that there are multiple structural breaks on variance of returns series and A-FIGARCH model outperforms. In addition, it is found evidence in favor of long memory on the conditional variance of returns series and hence it can be said that Borsa İstanbul is not weak form efficient market
Hysteresis in unemployment: evidence from sector-specific unemployment in Turkey
Get PDFHigh levels of inflation and unemployment have been experienced together in the world after 1970’s. Efforts of decreasing inflation have been achieved in the world after 1990’s. The fact that there has been no evidence the unemployment rate beginning to decrease despite the increasing growth rates in the USA and Europe countries recalls hysteresis effect. This phenomenon observed in Turkey after 1994 and 2001 crises. This paper examines hysteresis effect in sector-specific unemployment in Turkey. We apply conventional unit root tests and Zivot-Andrews structural break test to determine the presence of hysteresis effect. Hysteresis effect is only found in Manufacturing and Finance sectors
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
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