ABSTRACT
Received April 9, 1997; revision received Aug. 18, 1997; accepted Sept. 18, 1997; From the Department of Health Care Policy. Harvard Medical School; the Department of Psychiatry, University of California. San Diego, La Jolla. Califa and the Institute for Social Research, University of Michigan, Ann Arbor. Address reprint requests to Dr. Kessler. Department of Health Care Policy, Harvard Medical School, 180 Longwood Ave., Boston, MA 02115; kessler@hep.med.harvard.edu (e-mail).
