Seminario 17/01: – Jose G. Clavel (U. Murcia)- Total Information Analysis: Representation of Categorical Data Through Clusters

clusters

Abstract: Due to the presence of duality, cluster analysis has been proposed to analyze Total Information Analysis super distance matrix instead of a row-column joint graph. But the same duality causes that the traditional methods of clustering are not always capable to produce meaningful results. In this paper following Nishisato (2014), the clustering with p-percentile…

Seminario 16/08: – Mohammed Dore (U. Brock)- Spain in the Euro Area: Causal consequences leading to multiple desequilibria.

map-europe-spain

We consider quarterly data of the Spanish economy from 1987 to 2013 to establish causal interconnections in a model free manner, using symbolic dynamics and permutation entropy (PE) and establish the exogeneity of adoption of the Euro (in Jan 1999) as the governing mechanism that leads to the key causal impacts on (1) interest rates,…

27 Noviembre: Seminario 2015/27 – M.M. Sánchez de la Vega (U. Murcia) – El rechazo al fraude fiscal en España: Antes y después de la Gran crisis

fraude fiscal

Abstract This paper analyzes the rejection of tax fraud in Spain before and after the Great Depression and studies the role of certain determinants of two categories: internal or individual, and contextual, social or institutional. We use a logit model obtaining that the rejection of tax evasion depends positively on individual variables such as age…

13 Noviembre: Seminario 2015/25 – M.V. Caballero (U. Murcia) – Gráficos de Recurrencia Simbólicos

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Abstract Análogamente a como los gráficos de recurrencia permiten visualizar la correlación integral de una serie temporal, definimos la herramienta gráfica para la correlación integral simbólica de una serie vectorial, son los gráficos de recurrencia simbólicos y gráficos de recurrencia simbólicos coloreados.Estos gráficos informan sobre la estructura de la serie como se ilustrara con distintos…

30 Octubre: Seminario 2015/22 – M. I. González-Martínez (U. Murcia) – Nonconstant reputation effect in a dynamic tourism demand model for Spain

spain_tourism

Abstract Following the ideas of the Tourism Area Life Cycle (TALC) theory, we propose a dynamic econometric model for tourism demand where the reputation effect (the effect of the lagged demand on the current tourism demand) is not constant, but dependent on congestion. We test the model using panel data from Spanish regions during the…

Seminario 15/11: J. Sánchez-Campillo (U. Granada) – ¿En los centros privados se inflan las calificaciones de los estudiantes?

calificacionesfinales

Abstract Over ninety percent of the students taking the Spanish university admissions test (PAU) in recent years have passed on their first try. However, many public university degree programmes require high grades of their applicants. This requirement was reinforced in 2010 with the approval of the new PAU, which introduced a set of voluntary tests,…

Seminario 14/30: M.V. Caballero (UMU) – Symbolic Correlation Integral. Getting Rid of the Proximity Parameter

MVictoria

Abstract In this paper we introduce the symbolic correlation integral SC(m), which avoids the noisy parameter ” of the classical correlation integral defined by Grassberger-Procaccia. Moreover we provide the asymptotic distribution of SC(m) under the null of i.i.d. With a MonteCarlo simulation we show the size and the power performance of the new test under…

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

img1979136_Autoregressive-conditional-heteroskedasticity_osnova_Teorii_Volatilnosti

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

GlobalEconomics_PDC_178883120_D15M10Y2013

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…