1. Stacy Dale is a researcher at Mathematica Policy Research in Princeton, New Jersey. Randall Brown, , is a senior fellow there and the project's director and co-principal investigator. Barbara Phillips is the study's principal investigator; she is an independent consultant in San Diego, California. Jennifer Schore is a senior researcher and the deputy project director at Mathematica, in Princeton, and Barbara Lepidus Carlson is a senior sampling statistician and survey director there.