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 ...

In this paper, we study the least squares (LS) estimator in a linear panel regression model with unknown number of factors appearing as interactive fixed effects. Assuming that the number of factors ...

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 ...

In the first analysis we assessed how the number of lower-acuity ED visits changed when an urgent care center visit occurred within each ZIP code, using a fixed-effects panel regression.

To assess the effects of changes in female political representation on under-five mortality and social protection programs in each municipality, we used linear fixed-effect regression models for ...