This technical note discusses fixed effects models. Though a unified example, the note shows how omitted variable bias can plague estimates in cross-section regressions and how focusing attention on ...

A nonparametric modification is proposed for Cox's proportional hazards model (Cox, 1972, Journal of the Royal Statistical Society, Series B 34, 187-220), where the covariates are fixed, but their ...

For repeated events, fixed-effects regression methods-which control for all stable covariates-can be implemented by doing Cox regression with stratification on individuals. For nonrepeated events, we ...

From the simple fixed-effects regression, we found that different types of expenditures are changing significantly over time.

This technical note discusses fixed effects models. Though a unified example, the note shows how omitted variable bias can plague estimates in cross-section regressions and how focusing attention on ...