1,720,957 research outputs found
Is there such a thing as a safe bet ?
No full textThis paper is an attempt to set out a betting strategy appropriate to events with several possible final outcomes which are a) unambiguously defined and b) likely to show fluctuations in the respective probabilities as the event unfolds. It is then shown that, by placing bets of appropriate magnitude and at appropriate times, such as to take advantage of changing odds, it is possible to secure a certain profit, generally in advance of the outcome becoming known, and irrespective of which of the possible outcomes finally materialises. Furthermore, the bettor should enjoy the reassurance of an improving Net Expected Value (NEV), as the event progresses.The procedure, which may be viewed as a multiple hedging one, is suited to in running betting on individual match events, as well as on protracted seasonal events (such as a league championship in football or other sport). The principal requirement is that there be a reasonable expectation of a large amount of alternation in the relative prospects of at least two contenders. The procedure is outlined in general terms and illustrated with reference to real life football matches and league competitions from the 2015/6 season. It is seen to be profitable under the specified conditions. Apparent advantages in betting on draws and on favourites are discussed.
Appropriability rules, capital maintenance, and the efficiency of cooperative investment
No full textWhen is a multiple bet better than a single ?
No full textThe paper addresses an apparent paradox observed in betting on football scores, drawing on 20-year data from the English 2nd tier division (Championship). While accumulator bets have a lower Net Expected Value than single bets, ‘cross double’ bets on the scores, placed over successive playing rounds, produce distinctly better results and indeed a positive return overall. It is argued that this effect rests on the essential stability of the score frequencies across playing seasons and on the bookmakers’ failure, in setting the odds, to allow for occasional and temporary deviations from long run average frequencies. A betting strategy based on overdue scores occurring with compensating frequencies, and possibly clustered together, can then produce positive returns. Neglect of overdue scores can be expressed formally as a bias augmenting the probability of these and turning the odds in the bettor’s favour. It is shown that, while normally the bettor’s disadvantage is compounded in multiple bets, a compounded advantage results once the odds become better than fair. The paper also discusses certain quasi binomial characteristics of the betting involved and explores possible ways of hedging such bets ‘in running’.
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
Value Added as the Tax Base for Enterprise Income
Get PDFThe paper addresses the long standing asymmetry in the tax treatment of debt and equity costs through a direct comparison of two hypothetical regimes based exclusively on income taxation, broadly defined, and value added taxation. The model presented widens existing debate to encompass the choice between entrepreneurial and contractual use of inputs generally and including labour, as well as capital. Using representative functional forms and numerical illustrations the analysis explores the effect of the tax regimes on firm decisions concerning input selection, output level and vertical integration. The greater neutrality of value added taxation is shown to produce gains in terms of firm efficiency in production and concentration on competitive advantage
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
On the Behavior of Entrepreneurial Factor Supply to the Firm
Get PDFThis paper draws on an existing, but little used, approach to the choices governing the supply of ‘entrepreneurial’, in the sense of ‘residually remunerated’, resources to an enterprise, especially post start up. It focuses in particular on the hybrid ‘own factor demand/supply curve’ to the firm of Bronfenbrenner (1960), but attempts to treat such supply in conjunction with ‘contractual’ employment of resources, thus making use of gearing and portfolio concepts. To achieve this, it is found necessary for the hybrid schedule to be reinterpreted and recast as the locus of the relevant utility maximising choices. A model is presented which features combining all productive resources in a single factor F so as to concentrate on the choice between the entrepreneurial and contractual employment of these. The model identifies a variety of possible entrepreneurial resource supply responses to product market signals, including the possibility of divergence from the ‘normal’ expectation of a monotonically upward sloping supply curve. Such ‘unexpected’ behaviour is seen as rational and consistent, both with the needs of survival in distress and of safeguarding gains in the upside. Hence it is also efficient on welfare grounds. Analogies with the backward bending labour supply model and with risk/return choices in finance are pursued. The policy implication is that greater use of equity, especially in start ups and distress situations, should be encouraged
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
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