The aim of this paper is to explain why cross-sectional estimated migration correlations displayed in the academic and professional literature can be either not consistent, or inefficient, and to discuss alternative approaches. The analysis relies on a model with stochastic migration in which...

In this paper we explain how to use rating histories provided by the internal scoring systems of banks and by rating agencies in order to predict the future risk of a set of borrowers. The method is developed following the steps suggested by the Basle Committee. To introduce both migration...

In this paper we shed more light on the portfolio behaviour of the older part of the UK population over the period 1988-94. We employ data from the Retirement Survey and different econometric specifications in order to model the risky asset ownership decisions over time. The unique nature of the...

Information on the expected changes in credit quality of obligors is contained in credit migration matrices which trace out the movements of firms across ratings categories in a given period of time and in a given group of bond issuers. The rating matrices provided by Moody’s, Standard...

We consider a set of Markovian processes with Stochastic transition matrices. This specification extends the standard stochastic intensity model introduced by Cox in the two state case. Such a model is appropriate for the joint analysis of rating histories of several corporates, including the...

The aim of this paper is to explain why cross-sectional estimated migration correlations displayed in the academic and professional literature can be either not consistent, or inefficient, and to discuss alternative approaches. The analysis relies on a model with stochastic migration in which...

The UK´s Equal Opportunities Commission has recently drawn attention to the hidden braindrain when women working part-time are employed in occupations below those for whichthey are qualified. These inferences were based on self-reporting...

Two particular features of the position of women in the British labour market are theextensive role of part-time work and the large part-time pay penalty. Part-time work featuresmost prominently when women are in their 30s, the peak childcare years and, particularly formore educated women, a...

The increasing availability of longitudinal data on income in Europe greatly facilitates the analysis of income and poverty dynamics. In this paper, the results of longitudinal data analyses on income and poverty in three European welfare states are reported. Using panel data for Germany, the...

This paper studies the sequential sampling scheme as a solution to the problem of aliasing, where the sampling interval is restricted to a minimum allowable value. Sequential sampling is analyzed and it is proved that when the sampling ratio is an integral number, the associated spectral...