This study analyzes the effect of corporate bond rating changes over stock prices. We explore the effects over excess of returns and systematic risk. Rating changes by Moody´s, Standard and Poor´sor FitchIBCA are analyzed. On an efficient market, these changes will omly have some effect if...

Este trabajo estudia la situación de la Tercera Edad en España en 1980 y 1990 mediante el análisis de los hogares en los que viven una o más personas mayores. Se investiga, tanto desde un punto de vista descriptivo como en términos de probabilidad estimada, la relación existente entre que...

This work analyzes the effect of corporate bond rating rating changes over stock prices. This topic has not been analyzed before on the Spanish stock market. They are analyzed changes in the qualification of debt risk granted by agencies like Moody's or Standard and Poor's among others. On an...

Waiting lists are the main mechanisms for rationing demand in national health systems. The usual way to organize patients in a waiting list is on a simple first come first serve basis. Characteristics like the intensity of symptoms or the patient’s limitations in daily activities are not...