This paper proposes a model to describe the continuous time-evolution of density of the cross-sectional distribution of unemployment rates. The model is founded on the theory of analytical diffusion processes. The steady state distribution as well as the dynamic behaviour of the model are...

An analytical study of the evolution of the distribution of firm size in an industry is presented. A drift-diffusion model is proposed to express the time-evolution of density of firm size within the industry. The model blends the conventional, more or less static, determinants with the kinds of...