1,721,061 research outputs found
Have Capital Market Anomalies Attenuated in the Recent Era of High Liquidity and Trading Activity?
No full textWe are grateful to S.P. Kothari (the editor) and two anonymous referees for insightful and constructive feedback. We acknowledge and appreciate financial assistance fro
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
Risk warehousing within insurance firms and the role of securitization
No full textThesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management, 2011.Cataloged from PDF version of thesis.Includes bibliographical references (p. 55-58).Insurance firms perform two key economic functions. First, they intermediate risk by marketing, selling and administering insurance policies. Second, they warehouse the risks underlying those policies. If viewed as separate businesses, intermediation and warehousing have very different risk profiles and characteristics. While intermediation is a function essential to the firm's role, the warehousing of those risks is mostly optional. It involves deciding to retain risks for the insurance firm's account rather than hedge the risk and thereby pass it on to a third party. The decision to retain or hedge risks is critical to a firm's financial outcomes. Insurance risks include underwriting factors like longevity, mortality and exposure to natural disasters. They also include economic factors like interest rates, currencies, counter-party default and equity markets. The consensus in the academic theory is that since insurance firms face significant frictional costs in raising capital, value-maximising firms will hedge all risks where the spread costs of the hedging instrument are low. This would seem to include most or all economic risks. As for underwriting risks, where hedging spreads are high, the decision will be a trade-off The firm will weigh up the reduced Risk-Bearing Costs offered by the hedging counter-party versus the Risk Transfer Costs incurred in these transactions. In practice it seems many firms hedge less than might be expected, retaining more economic and underwriting risk than may be explained by the theory. Factors which may be driving a bias towards risk are briefly explored, including regulatory drivers and an expectation of beating the market. Insurance-linked securitization offers benefits as a means of hedging risk and enhancing shareholder value through reduced Risk-Bearing Costs, although it faces informational problems that increase Risk Transfer Costs. Catastrophe Risk Bonds appear to have achieved a critical mass on the back of some historical capital shortages in the reinsurance industry. The life insurance securitization market could be poised for growth, but based on the history of Catastrophe Risk Bonds it may also require capital shortages in the life industry as a catalyst. Regulatory capital requirements will play a pivotal role in this regard.by Johann J. Strydom.M.B.A
Corporate bankruptcy : assessment, analysis and prediction of financial distress, insolvency, and failure
No full textThesis: S.M. in Management Studies, Massachusetts Institute of Technology, Sloan School of Management, 2014.Cataloged from PDF version of thesis.Includes bibliographical references (pages 89-90).This paper is divided into three sections that address the various elements of understanding, predicting and analyzing corporate failure and bankruptcy. Part I covers the definitions of corporate failure, explains the bankruptcy process and then classifies various potential causes of failure into broad categories. The causes are bifurcated into company-specific versus external factors. The company-specific factors include an in depth discussion and analysis of business causes versus financial causes, as well as the interrelation between the two. The most important factors, such as financial and operating leverage, are explored in great detail to gain a better understanding of their implications and impact on corporate failure. Part II covers various approaches for analyzing corporate risk and predicting corporate failure. It first details the credit analysis process from the perspective of lenders and credit agencies as a method for credit evaluation and prediction of default. Then, it provides an in depth explanation of financial ratio analysis as a prediction method and provides an overview of the main statistical prediction models. It concludes with a discussion of the implications of the model findings with respect to the causes detailed in Part I. Lastly, Part III describes the outcome of the study performed to analyze the causes of failure as described in Part I by using a combination of the methods highlighted in Part II. The purpose of the study is to identify the sequence and magnitude of relative ratio deterioration in failed firms in order to establish the relative frequency of the various categories of causes of failure. Various ratios and metrics were used as proxies for relative liquidity complications, profitability issues, business problems, and leverage concerns. The impact of macroeconomic events is also evaluated by isolating the impact of the 2008-2009 recession on the relative ratio measures.by Konstantin A. Danilov.S.M. in Management Studie
Impact of the Special Treatment regulation of the Chinese Security Regulation Commission
No full textThesis (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, 2013.Cataloged from PDF version of thesis.Includes bibliographical references (p. 46-51).This paper examines the competence and independence of Chinese auditors. I find significant positive correlation between the modified audit opinions (MAOs) of China A-share companies from 2002 to 2011 and parameters of the clients' company-level control risks, auditor changes, and relative client importance. The evidence indicates that Chinese auditors generally demonstrate competence and independence. I argue that with the "Special Treatment" (ST) regulation, the audit quality of Chinese auditors remains satisfactory; without the ST regulation, the audit quality of Chinese auditors deteriorates. I use the regression results to substantiate that the audit failures of cross-listed Chinese companies occur because of the unavailability of the ST regulation, since the ST regulation has helped to improve the competence of auditors in China. Finally, I analyze the audit quality of "Big Four" affiliate companies in China, and find that the "Big Four" in China do not exhibit higher audit quality compared to local Chinese auditing firms. In fact, the quality of the "Big Four" auditing firms equals that of their non-"Big Four" peers..by Yanting Shi.S.M
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