Policy makers and analysts often view the reduction of student mobility across schools as a way to improve academic performance. Prior work indicates that children do worse in the year of a school move, but has been largely unsuccessful in isolating the causal effects of mobility. We use longitudinal data on students in New York City public…

Reorganizing primary school grade spans is a tractable and relatively inexpensive school reform. However, assessing the effects of reorganization requires also examining other organizational changes that may accompany grade span reforms. Using data on New York City public schools from 1996 to 2002 and exploiting within-school variations, we…