158,284 research outputs found

    The effectiveness of Antitrust Enforcement in Argentina, Chile and Perú during the 90´

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    During the last years, there has been an increasing concern about the importance of competition policy as a mean to increase efficiency in the allocation of resources and the supply and variety of goods and services. Competition between firms provides powerful incentives for cost minimization and technological improvements and also contributes to create an environment where firms can develop, encouraging free enterprises in the best interests of users and consumers. Both competition policy and regulation are public instruments that aim at improving the functioning of the market. Competition defense tries to avoid that firms abuse of their dominant position, or collude, or deny mergers and concentration operations that facilitate such conducts. Competition policy and regulation are complementary policies, which require an effective coordination between them.Antitrust; Competition Law; efficiency

    Macromodeling of Electrical Interconnects and Packages via PEEC Approach

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    Price discovery and trade fragmentation in a multi-market environment: Evidence from the MTS system

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    This is the post-print version of the final paper published in Journal of Banking and Finance. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 2012 Elsevier B.V.This paper proposes new metrics for the process of price discovery on the main electronic trading platform for euro-denominated government securities. Analysing price data on daily transactions for 107 bonds over a period of 27 months, we find a greater degree of price leadership of the dominant market when our measures (as opposed to the traditional price discovery metrics) are used. We also present unambiguous evidence that a market’s contribution to price discovery is crucially affected by the level of trading activity. The implications of these empirical findings are discussed in the light of the debate about the possible restructuring of the regulatory framework for the Treasury bond market in Europe

    Incidence of Executive Functions on Reading Comprehension Performance in Adolescents

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    Introducción.La comprensión lectora es una habilidad cognitiva compleja que se ha asocia-do a procesos ejecutivoscomola memoria de trabajo (MT) y la inhibición. Dado que el desa-rrollo de estas habilidades continúa hasta la adolescenciatardía, esta investigación propone estudiar el rol que sobre los distintos niveles de rendimiento en comprensión lectora ejercen ambos procesosen adolescentes de dos franjas etarias.Método.Se evaluó el desempeño en comprensión de textos, MT,inhibición,fluidez lectora y habilidades verbales en 104 adolescentes (12/13 años n= 53; 17/18 años n= 51).Resultados.Se encontró que los desempeños en comprensión lectora, MTe inhibición pre-sentan incrementossignificativos según la edad. A su vez, la correlación parcial mostró que lacomprensión lectora se asocia a: habilidades verbales, MTe inhibición.Por último, las prue-bas de diferencia de grupos señalan que los estudiantes con alto y bajo rendimiento en com-prensión difieren significativamente en habilidades verbales y funcionamiento ejecutivo en la franja 12/13 años. En cambio, sólo difieren significativamente en habilidades verbales en la franja 17/18 años.Conclusión.La comprensión lectora, la MT y la inhibición mejoran durante la adolescencia. Sin embargo, la relación entre estas habilidades difiere según el momento etario considerado.Introduction.Reading comprehension is a complex cognitive skill that has been associated with executive functions such as working memory (WM) and inhibition. Given that the development of these abilities continues through late adolescence, this study seeks to explore the role that both processes play with respect to varying levels of reading comprehension performance in adolescents in two age groups.Method.We evaluated performance in the comprehension of texts, WM, inhibition, reading fluency and verbal skills in 104 adolescents (12/13 years of agen= 53; 17/18 years of agen= 51).Results.We found that reading comprehension performance, WM and inhibition increased significantly with age. Further, a partial correlation showed that reading comprehension is associated with: verbal skills, WM and inhibition. Lastly, group difference testing indicates that students with high and low comprehension performance differ significantly in verbal skills and executive functioning in the 12/13 age group. In the 17/18 age group, however, they only differed significantly in terms of verbal skills.Conclusion.Reading comprehension, WM and inhibition improve during adolescence. However, the relationship among these abilities differs by age group.Fil: Demagistri, Maria Silvina. Universidad Nacional de Mar del Plata. Facultad de Psicología. Centro De Investigación en Procesos Básicos, Metodologías y Educación; ArgentinaFil: Richard's, Maria Marta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Psicología. Centro De Investigación en Procesos Básicos, Metodologías y Educación; ArgentinaFil: Canet Juric, Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Psicología. Centro De Investigación en Procesos Básicos, Metodologías y Educación; Argentin

    An Analytical Framework for Heterogeneous Partial Feedback Design in Heterogeneous Multicell OFDMA Networks

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    The inherent heterogeneous structure resulting from user densities and large scale channel effects motivates heterogeneous partial feedback design in heterogeneous networks. In such emerging networks, a distributed scheduling policy which enjoys multiuser diversity as well as maintains fairness among users is favored for individual user rate enhancement and guarantees. For a system employing the cumulative distribution function based scheduling, which satisfies the two above mentioned desired features, we develop an analytical framework to investigate heterogeneous partial feedback in a general OFDMA-based heterogeneous multicell employing the best-M partial feedback strategy. Exact sum rate analysis is first carried out and closed form expressions are obtained by a novel decomposition of the probability density function of the selected user's signal-to-interference-plus-noise ratio. To draw further insight, we perform asymptotic analysis using extreme value theory to examine the effect of partial feedback on the randomness of multiuser diversity, show the asymptotic optimality of best-1 feedback, and derive an asymptotic approximation for the sum rate in order to determine the minimum required partial feedback.Comment: To appear in IEEE Trans. on Signal Processin
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