In this paper, we consider a flexible class of semiparametric varying-coefficient mean residual lifetime (MRL) models that depended on an exposure variable where some effects may be functions of the exposure variables and some may be constants. We develop three-step estimation procedures to...

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...

Single-index-coefficient regression models (SICRM) have been proposed and used in the literature for avoiding the “curse of dimensionality”. However, there is no efficient model structure determination methodology for the SICRM. This may cause a tendency to use models that are much larger...