This article elaborates the results found in Petersen (1991) by discussing how to minimize time-aggregation bias in hazard-rate models with measured covariates. It first considers a model with a single categorical covariate with h categories. It derives analytically the bias of the estimator...

Hiring employees with advanced education, training, and experience has been a prevalent human resource practice in dynamic science-based industries, and a growing body of literature has demonstrated the importance of scientists in such fields. Little research has attempted to distinguish the...