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Structural FAVARによる世界景気の要因分析
Get PDF東アジアと主要先進国の合計16カ国の景気の変動要因を分析した。先端的な時系列分析の手法であるstructural FAVARは従来一般的なdynamic factor modelと異なり、景気に影響を与えている相互に独立な構造ショックを抽出できるため、景気変動の要因分解が容易にできる。東アジアと日米では「工程間分業」に伴い活発にやり取りされている資本財に体化した技術（投資特殊的技術進歩）の蓄積が景気変動に重要な役割を果たしていることが分かった
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
US external debt sustainability revisited: Bayesian analysis of extended Markov switching unit root test
No full textThe sustainability of US external debt, which has been an issue of global concern, is analyzed using a Markov switching (MS) unit root test applied to the flow of debt, i.e., the current account. The first to apply the MS unit root test to the issue of US external debt in order to examine local stationarity and global stationarity were Raybaudi et al. (2004). This paper introduces an extended MS unit root test where the transition probability is time-varying rather than fixed, as is usually the case, and the change of probability is explained by the real exchange rate, which theory suggests has a close relationship with the external balance. The extended MS unit root test calculated by the Markov Chain Monte Carlo (MCMC) method provides us with new insights on the issue of US external debt in recent years, suggesting that even though the debt/current account-GDP ratio remains relatively high, the probability of stationarity (sustainability) is unexpectedly high when recent US dollar depreciation is taken into account.US external debt sustainability Markov switching unit root test
US External debt sustainability revisited: Bayesian analysis of extended Markov switching unit root test
Get PDF米国の対外債務の維持可能性について、拡張型のマルコフ・スイッチング（ＭＳ）単位根検定という手法を使い検討した。定常、非定常の異なる局面間の遷移確率を従来一般的な固定型から可変型に変え、さらに各時点の状態確率が、対外収支と理論的にも密接な関係を持つ実質為替レートの影響を受けるというモデルになっている。同国の対外債務ＧＤＰ比は歴史的にみてまだ比較的高い水準にあるが、維持可能性確率が予想外に高い水準にあることがわかった。 : The sustainability of US external debt, which has been an issue of global concern, is analyzed using a Markov switching (MS) unit root test applied to the flow of debt, i.e., the current account. The first to apply the MS unit root test to the issue of US external debt in order to examine local stationarity and global stationarity were Raybaudi et al. (2004). This paper introduces an extended MS unit root test where the transition probability is time-varying rather than fixed, as is usually the case, and the change of probability is explained by the real exchange rate, which theory suggests has a close relationship with the external balance. The extended MS unit root test calculated by the Markov Chain Monte Carlo (MCMC) method provides us with new insights on the issue of US external debt in recent years, suggesting that even though the debt/current account–GDP ratio remains relatively high, the probability of stationarity (sustainability) is unexpectedly high when recent US dollar depreciation is taken into account
Intermediate goods-skill complementarity and income distribution
Get PDFThe income share disparity between skilled and unskilled labor has been previously analyzed in relation to the elasticity of substitution between these factors and capital and changes in skill-biased technological changes. This study analyzes how the expansion of intermediate inputs affects change in the shares of skilled and unskilled labor, which has not been sufficiently analyzed in previous studies. After estimating the elasticity of substitution between four production factors, skilled labor, unskilled labor, capital, and intermediate goods, an analysis using a four-factor dynamic stochastic general equilibrium (DSGE) model with a three-level nested constant elasticity of substitution (CES) production function and factor-biased technological changes was conducted. It demonstrated that the characteristic change in the labor share was mainly related to changes in relative prices between intermediate goods and other factors and the intermediate goods-skill complementarity, which reflects the low elasticity of substitution between intermediate goods and skilled labor. The change in relative prices among production factors and elasticities of substitution are the main drivers of changing income distribution. In contrast to previous studies, our model allows the gross output and value-added deflators to move differently and thus could clarify the mechanism of the changing labor shares
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