Find and extract concepts across multiple research papers

I want a list of effective ways to reduce homelessness backed by research

Research identifies several effective ways to reduce homelessness, each backed by different studies:

1. Specialized outreach, treatment, and housing programs for the homeless mentally ill have been beneficial, although measuring improved outcomes and cost-effectiveness remains challenging (Dickey, 2000).
2. Housing subsidies, such as offering housing allowances to individuals for every night they are not homeless, are proposed to reduce homelessness by aligning individual and societal incentives (O'Flaherty, 2012).
3. The Housing First program, which offers immediate access to housing without prerequisites for psychiatric treatment or sobriety, reduces time spent homeless and in psychiatric hospitals, and is cost-effective (Gulcur, Stefancic, Shinn, Tsemberis, Fischer, 2003).
4. Supported housing initiatives like the HUD-VASH program, which provide financial housing subsidies and case management support, are effective in reducing homelessness, improving social connectedness, quality of life, and reducing alcohol and drug use (O'Connell, Rosenheck, 2018).
5. System dynamics modeling indicates that a combination of Housing-First policy and preventative programs can effectively reduce homelessness (Kowarsch, Yang, 2022).
6. Personalised budgets, allocated to people experiencing homelessness, can effectively reduce the duration of homelessness when delivered innovatively and creatively by skilled workers (Brown, 2016).

In summary, a combination of housing-first approaches, supportive services, personalized budgeting, and preventative strategies are effective in reducing homelessness.