09ce90e0d8a5d310VgnVCM100000c2b1d38dRCRDapproved/UMICH/stats/Home/People/Faculty/Faculty PublicationsModeling the Drop-Out Mechanism in Longitudinal Studiesd8ce90e0d8a5d310VgnVCM100000c2b1d38d____Modeling the Drop-Out Mechanism in Longitudinal StudiesLittle, R. J. A.rlittleJournal of the American Statistical Association9019951112-1121jjsantosjjsantos1363024016300