1,721,082 research outputs found
Alternative approaches for the reformulation of economics
No full textIn the last decades most of advanced and developing economies have undertaken a deep structural transformation. This profound structural change, caused by the transition from a manufacturing economy to a service-based one, is among the causes of the current crisis (see Delli Gatti et al. 2012). The dereculation of the banking system with the consequent redirection of banking activity from the credit sector to the financial one, 1 and the liberalization of financial markets, the globalization and the delocalisation of production with the resulting labor market flexibility are just some of the many transformations affecting the socio-economic system in the recent decades
Base analítica y guía de utilización de los programas de ordenador «basicis-lm» e «islm-oada»
Get PDFSingle vs. multiple disclosures in an experimental asset market with information acquisition
Get PDFWe conduct laboratory experiments to study whether increasing the number of independent public signals in an economy with endogenous private information is an effective measure to promote the acquisition of information and to enhance price efficiency. We observe that the release of public information crowds out the traders' demand for private information under a single disclosure while favoring private information acquisition under multiple disclosures. The latter measure improves price accuracy in forecasting the asset fundamental value. However, multiple disclosures do not eliminate the adverse effect of market overreaction to public information, becoming a potential source of fragility for the financial system
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
The fine structure of spectral properties for random correlation matrices: an application to financial markets
Get PDFWe study some properties of eigenvalue spectra of financial correlation matrices. In particular, we
investigate the nature of the large eigenvalue bulks which are observed empirically, and which have
often been regarded as a consequence of the supposedly large amount of noise contained in financial
data. We challenge this common knowledge by acting on the empirical correlation matrices of two
data sets with a filtering procedure which highlights some of the cluster structure they contain,
and we analyze the consequences of such filtering on eigenvalue spectra. We show that empirically
observed eigenvalue bulks emerge as superpositions of smaller structures, which in turn emerge as
a consequence of cross-correlations between stocks. We interpret and corroborate these findings in
terms of factor models, and and we compare empirical spectra to those predicted by Random Matrix
Theory for such models
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
Advances in the Agent-based Modeling of Economic and Social Behavior
Get PDFIn this review we discuss advances in the agent-based modeling of economic and social systems. We show the state of the art of the heuristic design of agents and how behavioral economics and laboratory experiments have improved the modeling of agent behavior. We further discuss how economic networks and social systems can be modeled and we discuss novel methodology and data sources. Lastly, we present an overview of estimation techniques to calibrate and validate agent-based models and show avenues for future research
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