“…Yang & Park gave semiparametric efficient estimators of the regression coefficient vector β in the parametric part of the partially linear varying coefficient model together with rate‐optimal estimators of the nonparametric component functions f j . The latter paper, by Yang & Lee , extended this to the generalized setting with a link function g , so that the model accommodates discrete responses. The methods studied in these works may be tailored immediately to a model such as (6.5) where some different smoothing variables share a common linear effect variable.…”