In most industrialized countries, employment has grown predominately in jobs at the upper and lower tails of the wage distribution, while employment in the middle part of the distribution has stagnated or declined. This process of job polarization is well documented for a number of countries. We...

Two approaches for model-based clustering of categorical time series based on time- homogeneous first-order Markov chains are discussed. For Markov chain clustering the in- dividual transition probabilities are fixed to a group-specific transition matrix. In a new approach called Dirichlet...

Over the last decades, the United States and other developed countries have experienced profound job polarization whereby employment in high-skill and low-skill occupations increased at the expense of employment in middle-skill occupations. This paper examines the wage effects of job...