This document contains six papers from the ninth World Conference of Therapeutic Communities that highlight research on therapeutic communities (TC) and discuss how to apply research findings in practical ways. Papers include: (1) "TC Research: Overview & Implications" (George De Leon); (2) "Emerging Cross-Cultural TC Research" (D. Vincent Biase and Arthur P. Sullivan); (3) "Follow-up of the Former Residents of the Emiliehoeve, a TC for Drug Addicts" (Martien Kooyman); (4) "Lasting Effects: Detoxification from Methadone Maintenance in a TC" (James I. Sorensen, et al.); (5) "Circumstances, Motivation, Readiness & Suitability: Do These Factors Relate to Treatment Tenure in TCs?" (George De Leon and Nancy Jainchill); and (6) "Juvenile Drug Addiction: A Study on Typology of Addicts and Their Families" (Luigi Cancrini, et al.). (NB)