A Note on the Weibull Distribution and Time Aggregation Bias
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Røed, Knut og Tao Zhang
Number in series: 23
The application of continuous time Weibull models on discrete unemployment duration data may produce bias in the estimated shape of the hazard rate. The bias can be substantial even for weekly duration data, and it is seriously aggravated if the Weibull model is erroneously mixed with a Gamma distribution for unobserved heterogeneity.
Unemployment duration, Weibull model, Time aggregation bias
Project:Oppdragsgiver: Norges forskningsråd
Frisch prosjekt: 1203 - Sorting, exposed groups and labour market programmes