TY - JOUR A1 - Fitzgerald, J. A1 - Gottschalk, P. A1 - Moffitt, R. 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 -