This chapter focuses on two of the developments in panel data econometrics since the Handbook chapter by Chamberlain (1984).The first objective of this chapter is to provide a review of linear panel data models with predetermined variables. We discuss the implications of assuming that...

A semiparametric model for observational data combines a parametric form for some component of the data generating process (usually the behavioral relation between the dependent and explanatory variables) with weak nonparametric restrictions on the remainder of the model (usually the...