Researchers have found ways to use housing to reduce addiction. Between 1990 and 2006, researchers in Birmingham, Alabama, conducted clinical trials of abstinence-contingent housing with 644 homeless people with crack cocaine addictions. Two-thirds of participants remained abstinent after six months, a very high rate of abstinence, compared to other treatment programs. Other studies found that around 40 percent of homeless in abstinence-contingent housing maintained their abstinence, housing, and jobs.
