One important issue related to credit risk is the analysis of rating transitions and default rates. This consists of examining changes in the rating that international organizations give to firms that agree to be inspected. In this paper real credit risk data from the historical Standard &...

In this paper we use the index we call Population Dynamic Theil's Entropy to analyze as the income inequality varies on time. The index may consider both the inequality among the classes in which we assign the individuals and the inequality within each class. This inequality measure working in a...

In this paper we propose a modification of the Dynamic Theil's Entropy that considers the inequality in the whole population. We decompose it into three addends and we show how to compute them within a Markov model of income evolution. In this way the income inequality can be measured in the...

In this paper we propose a stochastic model to analyze the time evolution of inequality within an economic system. The classical inequality indices (Herfindahl-Hirschman, Gini and Theil’s entropy) are thereby turned into a dynamic form. We show, by using a simulative approach, how it is...