%0 Journal Article %T Are middle schools harmful? The role of transition timing, classroom quality and school characteristics %A Holas, I. %A Huston, A.C. %D 2012 %R 10.1007/s10964-011-9732-9 %P 333-345 %J Journal of Youth and Adolescence %V 41 %I 3 %2 ISSN: 0047-2891