The Michigan Association of Recovery Residences, Inc. (MARR) located in Holland, is the Michigan statewide affiliate of the National Alliance for Recovery Residences, Inc. (NARR). The term “Recovery Residence” was adopted by NARR and refers to standards-based recovery housing. As the sole Michigan NARR Affiliate, MARR certifies provider compliance with the NARR standards and code of ethics. The standard is based upon the Social Model of Recovery Philosophy (Social Model) which emerged in California some 70 years ago, attracted science – based academic researchers over the following decades which, in turn, led to Social Model expanding nationwide in the late 60’s. Recovery – oriented housing founded on Social Model principles continues to be studied academically due to its proven effectiveness in promoting and sustaining long-term recovery.