Vol 46 No 2 (2012) Special Issue January 4, 2013September 4, 2016 Co-Editor Editorial By Abdus S Wahed Robust regression estimator for a semiparametric measurement error model with multiple covariates using Monte-Carlo methods By A. A. TSIATIS Mediation analysis without sequential ignorability: using baseline covariates interacted with random assignment as instrumental variables By D. S. SMALL Commentary of “Mediation analysis without sequential ignorability: using baseline covariates interacted with random assignment as instrumental variables” by Dylan Small By ELIZABETH L. OGBURN Adaptive matching in randomized trials and observational studies By M. J. VAN DER LAAN, L. B. BALZER, M. L. PETERSEN The interactive decision committee for chemical toxicity analysis By CHAERYON KANG, HAO ZHU, FRED A. WRIGHT, FEI ZOU, MICHAEL R. KOSOROK Bayesian adaptive dose finding based on efficacy and toxicity By PETER F. THALL Tests for dependence in binary repeated measures data By M ATAHARUL ISLAM, RAFIQUL I. CHOWDHURY, ABDULHAMID ALZAID Maximum likelihood estimation of optimal weight function for weighted log-rank test By QING XU, NICHOLAS J. CHRISTIAN, JONG-HYEON JEONG Assessing the effect of treatment regimes on longitudinal outcome data: application to revamp study of depression By SACHIKO MIYAHARA, ABDUS S. WAHED