This report was prepared for and funded by the Office of the Assistant Secretary for Planning and Evaluation, U.S. Department of Health and Human Services under Contract No. DHHS-100-92-0015, D.O.08. The contributions of Deanna Cooke, Joy Near, Roxanne Pfister, Nancy Snyder, and Kenneth Thevenin are greatly appreciated. In addition, the helpful comments provided by our Project Officers, Elisa Koff and Amy Nevel, and their colleagues, Barbara Broman and Ann Segal, and other anonymous reviewers are much appreciated. We also appreciate the production assistance of Fanette Jones, Carla Butler, and Cheryl Oakes in the preparation of this report.