In a new PACE Working Paper, Luke Dauter and Bruce Fuller, University of California, Berkeley, explore “How Diverse Schools Affect Student Mobility: Charter, Magnet, and Newly Built Campuses in Los Angeles.” Achievement often suffers when families or students change schools. Yet pupil mobility is now encouraged in urban districts like Los Angeles, as mixed-markets of charter, magnet, and pilot schools sprout. Over 60 new facilities were opened as well during the 2002-2008 period, thanks to $27 billion in school construction mounted by the Los Angeles Unified School District (LAUSD). This paper reports on the likelihood that students exit their school mid-stream, before completing a grade cycle or graduating. The authors find that African American and White students were more likely to exit their school, compared with Latino, non-English speaking, and foreign-born students, yet students attending overcrowded schools – often situated in low-income Latino neighborhoods – exited at higher rates. Charter and magnet school students left their schools at much lower rates, compared with peers in regular schools, after taking into account family background. As LAUSD opened new high schools, pupil mobility slowed markedly. The authors also found that Latino students were more likely than Black or White peers to move to a newly built school, rather than entering a charter or magnet school, likely due to the district’s commitment to relieve overcrowding in L.A.’s most densely populated communities.