TY - JOUR A1 - Wolfe, B. A1 - Haveman, R. A1 - Donna Ginther, D. A1 - An, C.B. T1 - The 'window problem' in studies of children's attainments: A methodological exploration Y1 - 1996 DO - 10.2307/2291716 JF - Journal of the American Statistical Association VL - 91 IS - 435 SP - 970 EP - -982 ER -