THE STUDY WAS CONDUCTED UNDER THE AUSPICES OF THE PENNSYLVANIA PRISON SOCIETY IN AN EFFORT TO DETERMINE THE EXTENT AND NATURE OF CHANGES MADE IN THIS PHASE OF THE CORRECTIONAL SYSTEM UNDER THE IMPETUS OF THE SAFE STREETS ACT. THE 18 MONTH PROJECT BECAME OPERATIONAL IN SEPTEMBER 1974 UPON GRANT APPROVAL BY THE NATIONAL INSTITUTE OF LAW ENFORCEMENT AND CRIMINAL JUSTICE'S INNOVATIVE RESEARCH PROGRAM. THE MAJOR SOURCES OF DATA WERE A SURVEY OF EX-PRISONERS BASED ON A PANEL OF 300 MEN AND WOMEN RELEASED FROM THE PHILADELPHIA PRISONS AND A SURVEY OF AGENCIES ENGAGED IN AFTERCARE SERVICES. RELATED PROJECTS INCLUDED AN HISTORICAL REVIEW OF AFTERCARE IN PHILADELPHIA, A LONGITUDINAL STUDY OF CLIENT DEMAND AT ONE PARTICULAR AGENCY, AND A SOCIOMETRIC STUDY OF INTERAGENCY RELATIONSHIPS. FOR A SUMMARY OF THIS REPORT, SEE NCJ-37010. (AUTHOR ABSTRACT MODIFIED)