TY - JOUR A1 - Land, K.C. A1 - Guralnik, J.M. A1 - Blazer, D.G. T1 - Estimating increment-decrement life tables with multiple covariates from panel data: The case of active life expectancy Y1 - 1994 DO - 10.2307/2061887 JF - Demography VL - 31 IS - 2 SP - 297 EP - -319 ER -