1,720,990 research outputs found
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
Heuristic centred-belief players
No full textStrategic behaviour often diverges from Nash-equilibrium, in particular in inexperienced play. Studying a class of games in which participants choose their payment and receive it as long as their opponent chooses a different amount, I show that none of the popular models of behavioural game theory predicts the predominant aggregate choice pattern consistently. And yet, noisy introspection (Goeree and Holt, 2004) readily accounts for about half of the individual observations. The reason for the apparent paradox and the mis-match of the aggregate data and the models is a disregarded behavioural type that makes up about 25% of the population. These 25% display a specific form of central-tendency bias, holding beliefs that peak in the centre of the option set and that are roughly symmetric. In addition, the players show a more heuristic process translating their belief into actions, as their choices cannot be explained readily by quantal responding. The behavioural pattern of a ‘centred belief’ in connection with boundedly-rational decision-making is present also in another prominent game from the literature on behavioural game theory, the 11–20 game. Finally, I show that classifying players as ‘heuristic centred-belief types’ by one game’s beliefs has predictive power for behaviour in the other game.publishe
Counterpunishment revisited: an evolutionary approach
Get PDFEvolutionary game theory has shown that in environments characterised by a social-dilemma situation punishment may be an adaptive behaviour. Experimental evidence closely corresponds to this finding but yields contradictory results on the cooperation-enhancing effect of punishment if players are allowed to retaliate against their punishers. The present study sets out to examine the question of whether cooperation will still be part of an evolutionary stable strategy if we allow for counterpunishment opportunities in a theoretic model and tries to reconcile the seemingly contradictory findings from the laboratory. We find that the apparent contradictions can be explained by a difference in the number of retaliation stages employed (one vs many) and even small differences in the degree of retaliativeness.Public goods; Strong reciprocity; Conformism; Counter-punishment; Evolution of behavior
What are the equilibria in public-good experiments?
No full textMost social-preference models have been tailored to yield only a full-defection equilibrium in one- shot linear public-good situations. This paper determines the Nash-equilibrium sets that result from experiment participants’ elicited preferences. The data show that multiple equilibria are relatively frequent even in a standard three-player setting. In this perspective, the common finding of close-to- omnilateral defection at the end of repeated public-good games is surprising and raises the question of why the dynamics of play seem to select this equilibrium out of the existing equilibria.publishe
The lottery player’s fallacy : Why labels predict strategic choices
No full textThis paper examines games with non-neutral option labels (such as “A”, “B”, “A”, “A”) and finds surprisingly invariant behaviour across games. The behaviour closely resembles the choices people make when they have to bet on one of the options in individual lotteries. An option’s ‘representativeness’ (lack of distinguishing features) and ‘reachability’ (physical centrality, salience, and valence) determine choice behaviour in both the lotteries and the highly strategic games. There is no evidence of people best-responding to others’ betting(-like) behaviour. This is in line with the idea that once people decide that strategic reasoning would not take them any further, they pick an alternative as if they were betting on one of their ‘current best-responses’. The findings explain the well-documented seeker advantage in hide-and-seek games, as well as why participants often display behaviour that could be exploited by others. On top, they help understand why in national lotteries, people also tend to bet on identical subsets of the available numbers.publishe
Elicited Salience and Salience-Based Level-k
No full textA level-k model based on a specific salience-pattern is the only model in the literature that accounts for behaviour in hide-and-seek games. This paper presents nine different experiments designed to measure salience. The elicited salience patterns tend to be similar, but none of them is similar to the pattern needed to allow the level-k model explain the hide-and-seek data. When based on any of the empirical salience measures, the salience-based level-k model does not fit the data well.publishe
(Un-)Stable Preferences, Beliefs, and the Predictability of Behaviour
No full textI show that whether participants generally believe in others’ preference stability is a crucial determinant of behaviour. Whether a participant’s behaviour can be predicted by her best-response or a Nash-equilibrium in a context where she can observe others' elicited preferences depends heavily both on the participant having stable preferences and on her generally believing in others’ preference stability. The latter is true because such a belief is associated with less dispersed beliefs
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