Seminario 14/26: M.A.CARNERO (UA) – Identification of asymmetric conditional heteroskedasticity in the presence of outliers

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ABSTRACT: The identification of asymmetric conditional heteroscedasticity is often based on sample cross-correlations between past and squared observations. In this paper we analyse the effects of outliers on these cross-correlations and, consequently, on the identification of asymmetric volatilities. We show that, as expected, one isolated big outlier biases the sample cross-correlations towards zero and hence could hide true leverage…

Seminario 14/22 – Enrique SENTANA (CEMFI): Is a normal copula the right copula?

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Abstract   Nowadays copulas are extensively used in economic and finance applications, with the Gaussian copula being very popular despite ruling out non-linear dependence, particularly in the lower tail. We derive computationally simple and intuitive expressions for score tests of Gaussian copulas against Generalised Hyperbolic alternatives, which include the symmetric and asymmetric Student t, and Hermite polynomial expansions. We…

Seminario nº 12:   Interaction matrix selection in spatial econometric  models: Application to the Schumpeterian Growh  model with worldwide interactions

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Cem Ertur, especialista de prestigio  en econometría espacial (y coautor de varios profesores de la linea 9 del programa, especializados en esta rama de la econometría) hizo una visita  a la UMU en junio. Gracias a la cooperación entre la UMU y la UNED, pudimos disfrutar de un seminario muy didáctico y conocer nuevos resultados…