Layoffs and duration dependence in a model of turnover

A semi-Markov model of turnover, resulting from optimizing behavior on the part of workers, is developed. Duration dependence in the transition out of employment is modelled as resulting from a layoff probability which decreases with tenure. Some preliminary results, based on DIME data, are presented. These indicate that a declining hazard rate in the transition out of employment is a significant feature of the data.