In the fall of 1999, the Urban Institute, with support from the U.S. Department of Housing and Urban Development (HUD) and The MacArthur Foundation, held a symposium on the issues of Section 8 mobility and neighborhood health. The purpose of the symposium was to assess what is known about the potential impacts of the Section 8 assisted housing program on neighborhoods and to identify implications for both policy development and future research. This report draws on the existing research literature and the symposium discussion to summarize the current state of knowledge and debate on the issues of Section 8 mobility and neighborhood health. (Authors)