Public Health Insurance and Medical Treatment: The Equalizing Impact of the Medicaid Expansions Janet Currie UCLA and NBER Jonathan Gruber MIT and NBER April, 2000 We are grateful to Richard Frank, Michael Grossman, Kevin Hassett, Ted Joyce, Dan Kessler, Mark McCellan, David Meltzer, Cairan Phibbs, to seminar participants at the University of Arizona, Boston College, the University of Chicago, Dartmouth College, the Univeristy of Illinois, the University of Maryland, MIT, the NBER Summer Institute, Princeton University, and UCLA, and to Roger Gordon and two anonymous referees for helpful comments; to the National Institute of Aging, NICHD, and the Sloan Foundation for financial support; and to Phil Ellis for research assistance.