Fixed Effects Estimation of Large-TPanel Data Models
综述了长面板数据中固定效应估计的最新进展，重点讨论了个体和时间效应半参数模型、分裂面板刀切偏差校正、非平衡面板、分布与分位数效应等，并指出所有模型的偶然参数偏差阶数均为p/n。
This article reviews recent advances in fixed effects estimation of panel data models for long panels, where the number of time periods is relatively large. We focus on semiparametric models with unobserved individual and time effects, where the distribution of the outcome variable, conditional on covariates and unobserved effects, is specified parametrically while the distribution of the unobserved effects is left unrestricted. In contrast to existing reviews on long panels, we discuss models with both individual and time effects, split-panel jackknife bias corrections, unbalanced panels, distribution and quantile effects, and other extensions. Understanding and correcting the incidental parameter bias caused by the estimation of many fixed effects are our main focuses, and the unifying theme is that the order of this bias is given by the simple formula p/ n for all models discussed, with p being the number of estimated parameters and n the total sample size.