TY - JOUR A1 - Fitzgerald, John A1 - Gottschalk, Peter A1 - Moffitt, Robert T1 - An analysis of sample attrition in panel data: The Michigan Panel Study of Income Dynamics Y1 - 1998 DO - 10.2307/146433 JF - The Journal of Human Resources VL - 33 IS - 2 SP - 251 EP - -299 ER -