We develop an estimator and tests of a discrete time mixed proportional hazard (MPH) model of duration with unobserved … distribution. We apply our estimator to the duration of price spells in weekly store data from IRI. We find substantial unobserved … heterogeneity, accounting for a large fraction of the decrease in the Kaplan-Meier hazard with elapsed duration. Still, we show that …

This paper considers models for unobservables in duration models. It demonstrates how cross-section and time …-series variation in regressors facilitates identification of single-spell, competing risks and multiple spell duration models. We also …

unemployment insurance benefits on the duration of joblessness in Austria, where the benefit schedule has kinks at the minimum and …