The information stated by Public Hospitals to the Central Administration of the Health System, concerning cases of clinical hospitalization, goes through a process of grouping Homogeneous Diagnoses. The “pathological-numeric” codification is a matter of extreme importance for the monitoring...

The Markowitz mean-variance optimizing framework has served as the basis for modern portfolio theory for more than 50 years. However, efforts to translate this theoretical foundation into a viable portfolio construction algorithm have been plagued by technical difficulties stemming from the...

In many economic contexts, a given function can be disaggregated as a linear combination of gradients. Examples include the literature on the characterization of aggregate demand and excess demand, as initiated by Sonnenschein (1973ab), and the model of efficient household behaviour recently...

El objetivo fundamental de este trabajo es analizar las motivaciones dominantes en los alumnos de las Licenciaturas de Economía (LE) y Administración y Dirección de Empresas (LADE)a la hora de enfrentarse a las asignaturas de Estadística. Para ello se ha realizado una encuesta de opinión,...

The Atkinson Report examined measurement of public services' output and productivity. Traditionally, only inputs to the government sector were reflected in the National Accounts. This treatment imposed zero productivity growth for the government sector. From the late 1990s, the United Kingdom...

This paper aims at increasing our insights into the way financial markets respond to news. We view the market as a (nonlinear) filter of news on fundamentals. A stylized version of this situation is obtained by considering by a time dependent dividend rate which is driving the market. To model...

This paper prepared for the Handbook of Statistics (Vol.14: "Statistical Methods in Finance"), surveys the subject of stochastic volatility. the following subjects are covered: volatility in financial markets (instantaneous volatility of asset returns, implied volatilities in option prices and...

This paper is a survey which describes and explains in non-technical terms the logic behind various methodologies used in conducting retrospective quantitative evaluations of public policy programs. The programs usually have as their main targets firms or individuals who benefit from direct...

According to conventional wisdom, intergenerational transfers can survive, in the absence of altruism, only if the old are net recipients. I prove that this need not hold in an overlapping generations model with a fixed factor. For example, the middle-aged owning land may gain by providing...

Since the Finnish unemployment rate has rocketed to a very high level in the beginning of the 1990?s it is worth to study to what extent the unemployment rate prevailing today is due to cyclical or to structural reasons. In this paper we try to estimate two different indicators that represent...