Motivated by a longitudinal study on factors affecting the frequency of clinic visits of older adults, an exploratory time varying lagged regression analysis is proposed to relate a longitudinal response to multiple cross-sectional and longitudinal predictors from time varying lags. Regression...

Consider the correlation between two random variables (X,Y), both not directly observed. One only observes and , where all four functions {[phi]l([dot operator]),[psi]l([dot operator]),l=1,2} are unknown/unspecified smooth functions of an observable covariate U. We consider consistent estimation...

In covariate-adjusted regression (CAR), the response (Y) and predictors (Xr,r=1,...,p) are not observed directly. Estimation is based on n independent observations , where , and [psi]([dot operator]) and are unknown functions. In this paper, we discuss the asymptotic properties of this method...