The mean-variance model from the inverse of the variance-covariance matrix

In this paper we obtain the main results of the Markowitz mean-variance model from the inverse of the covariance matrix, following a shorter and mathematically rigorous path. We also obtain the equilibrium expression of Sharpes capital asset pricing model (CAPM).capm, beta, portfolio composition

Contra la indiferència: catalitzadors de la urbanitat

Peer Reviewe

The Romance subgrouping of the Catalan language: A dialectometric approach to the Atlas Linguistique Roman

The aim of this paper is to present a first dialectometric approach to the geolinguistic distribution of the Romance varieties using a new corpus based on the Atlas Linguistique Roman (ALiR) which is currently being developed at the Centro Ramón Piñeiro para a Investigación en Humanidades. However, the dialectometrization of ALiR will allow us not only to analyze the linguistic distance among the varieties of Romania Antiqua, but also to shed light from a quantitative perspective on several issues that have historically raised controversy. Specifically, this paper deals with the Romance subgrouping of the Catalan language, an issue that has been recently reopened by Radatz (2012).The aim of this paper is to present a first dialectometric approach to the geolinguistic distribution of the Romance varieties using a new corpus based on the Atlas Linguistique Roman (ALiR) which is currently being developed at the Centro Ramón Piñeiro para a Investigación en Humanidades. However, the dialectometrization of ALiR will allow us not only to analyze the linguistic distance among the varieties of Romania Antiqua, but also to shed light from a quantitative perspective on several issues that have historically raised controversy. Specifically, this paper deals with the Romance subgrouping of the Catalan language, an issue that has been recently reopened by Radatz (2012)

The Spanish term structure of interest rates revisited: cointegration with multiple structural breaks, 1974-2010

In this paper we consider the possibility that a linear cointegrated regression model with multiples structural changes would provide a better empirical description of the term structure model of interest rates. Our methodology is based on instability tests recently proposed in Kejriwal and Perron (2010) as well as the cointegration test in Arai and Kurozumi (2007) and Kejriwal (2008) developed to allow for multiple breaks under the null hypothesis of cointegration.Term structure of interest rates; Cointegration; Multiple Structural Breaks.

Presentación.

Sin resume

Revaloritzar la imatge del professor

Abstract not availabl

Estudios sobre el género Inocybe (Agaricales) en la Península Ibérica e Islas Baleares, V. Inocybe squarrosa var. macrosperma var. nov., descubierto en Cataluña

Studies on the genus lnocybe (Agaricales) in the Iberian Peninsula and Balearic Islands, V. Inocybe squarrosa var. macrosperma var. nov., discovered in Catalonia. I. Squarrosa var. macrospenna var. nov. is described; a historical survey of this rare species is made. Line drawings of its microcharacters are given.Se describe la nueva variedad I. Squarrosa var. macrospenna, y se realiza un breve recorrido histórico desde la descripción original de esta rara especie. Se aportan dibujos de los caracteres microscópicos

Estudios sobre el género Inocybe (Agaricales) en la Península Ibérica e Islas Baleares, V. Inocybe squarrosa var. macrosperma var. nov., descubierto en Cataluña

Studies on the genus lnocybe (Agaricales) in the Iberian Peninsula and Balearic Islands, V. Inocybe squarrosa var. macrosperma var. nov., discovered in Catalonia. I. Squarrosa var. macrospenna var. nov. is described; a historical survey of this rare species is made. Line drawings of its microcharacters are given.Se describe la nueva variedad I. Squarrosa var. macrospenna, y se realiza un breve recorrido histórico desde la descripción original de esta rara especie. Se aportan dibujos de los caracteres microscópicos