participants in the early stages of recovery and in substance use disorder (SUD) treatment; or those that have completed within the past year SUD treatment for opioid use disorder or stimulant use disorder or have a history of overdose from opioid use.

The Kentucky ATR (KATR) strategy is a 25-county program that links county residents at or below the 200% national poverty level who have an illicit SUD and are in treatment or early recovery to evidence-based RSSs such as recovery housing, and to other RSSs.

The KATR linkage approach uses vouchers as a linkage strategy for individuals in SUD treatment who have no other funding options to acquire critical RSSs. As such, KATR's linkage through vouchers is a "last resort" approach for linking to RSSs.

Recovery capital will be assessed using the Brief Assessment of Recovery Capital-10 (BARC-10); 10 item survey unidimensional measure of recovery capital, scores may range from 6-60 at any given time. Evaluation of the measure suggests that individuals who have a higher score are likely to reach or sustain a year or longer of recovery from substance use disorder.

Number of drug overdoses will be assessed with the following survey question: In the past 30 days, did you experience an overdose or take too much of a substance that resulted in needing supervision or medical attention?

Number of days illicit substance use will be assessed with the following survey question: During the past 30 days, how many days have you used any substance