de Haan, M. and Plug, E. (2011). Estimating intergenerational schooling mobility on censored samples: consequences and remedies Journal of Applied Econometrics, 26(1):151--166.
Koopman, S., Lucas, A. and Schwaab, B. (2011). Modeling frailty correlated defaults using many macroeconomic covariates Journal of Econometrics, 162(2):312--325.