1,721,163 research outputs found
The dynamics of financial markets and one-dimensional discontinues piecewise-linear maps
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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
A statistical equilibrium perspective on corporate profitability
No full textKumulative Dissertation in Zusammenarbeit mit 3 weiteren Autoren. - Dissertation, Universität Bamberg, 201
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
The Economic Powerhouse: Corporate Profitability and Growth from the 19th to the 21st Century
Full text linkDissertation, Otto-Friedrich-Universität Bamberg, 2024Three research projects are at the core of this thesis. Their common point of departure is the seminal paper by Alfarano et al. (2012), in which the authors analyze the statistical and distributional patterns that characterize profitability of corporations in the U.S. during the years 1980 to 2011. They find the profitability of competitive corporations, measured by their return on assets (ROA), to be best described by a stationary diffusion process comprising a deterministic mean-reverting tendency and stochastic noise. The parameters of the process then are the median (location) and mean deviation from the median (dispersion) of the profit rates of the overall population of competitive firms and a firm-specific diffusion constant.
In this thesis, we find this process to describe the statistical behavior of profit rates in very different countries and very different time periods. Time-series and cross-sections of profit rates fall onto Laplace distributions for the U.S. between 1863 and 2013 (chapter 3), for Germany between 1919 and 1944 (chapter 4) as well as 45 countries around the world between 1983 and 2013 (chapter 5). So profit rates display qualitatively the same statistical behavior, culminating in the Laplace distribution of profit rates, across time and space. Significant departures from the distribution are transitory and only occur under exceptional circumstances, such as severe economic depressions or wartime. Quantitative differences in the parameter values, however, appear persistently across countries, potentially being the result of country-specific characteristics like the legal system. Thus, departures from the distribution mark exceptional economic conditions and severe distress while different parameter values seem to be the result of country-specificities. Overall, profitability qualifies as reliable vital signs of the economy with robust statistical patterns across space and time. Departures from these statistical patterns then carry substantial information about the potential length and severity of crises
Essays in Industrial and Political Economics
No full textKumulative Dissertation, Otto-Friedrich-Universität Bamberg, 2024This cumulative dissertation contains three articles. The first article concerns the small but growing sub-field of Contest Theory, i.e., Game Theory applied to contests. The key question addressed here is the optimal design of a primary, i.e., the competition within a political party. The second article looks at firms’ decision to disclose relevant product information or to remain silent when consumers are not perfectly rational, e.g., when they are inattentive. In the third article, I analyze the broader picture of the links between secondary (used) and primary (new) markets. All topics cover competition between economic agents; whether in a contest, a seller-buyer relationship or the broader perspective of multiple economic agents buying and selling products across different markets. In the first article, the individuals’ degree of rationality plays a minor role, i.e., individuals are assumed to be perfectly rational. In the remaining articles, the traditional modeling is extended by behavioural assumptions
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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