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 ...

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 ...

Secondary data from the Medicare Cost Report (MCR), the Agency for Healthcare Research and Quality (AHRQ), and American Hospital Association Annual Survey (AHA) was used to test hypothesized ...