There are large numbers of homeless people around the world. Interventions to address homelessness seem to be effective, though better quality evidence is required.

What are the main findings of this review?
Included interventions perform better than the usual services at reducing homelessness or improving housing stability in all comparisons. These interventions are:
• High intensity case management
• Housing First
• Critical time intervention
• Abstinence-contingent housing
• Non-abstinence-contingent housing with high intensity case management
• Housing vouchers
• Residential treatment

These interventions seem to have similar beneficial effects, so it is unclear which of these is best with respect to reducing homelessness and increasing housing stability.