109 Part A _ Articles Moving Evidence Into Policy: The Story of the At Home/Chez Soi Initiative’s Impact on Federal Homelessness Policy in Canada and its Implications for the Spread of Housing First in Europe and Internationally Eric Macnaughton, Geoffrey Nelson, Paula Goering, and Myra Piat Wilfrid Laurier University, Vancouver BC, Canada Wilfrid Laurier University, Waterloo ON, Canada Toronto, ON, Canada Douglas Mental Health University Institute, McGill University, QC, Canada \ Abstract_ The purpose of this study was to understand the sustainability of the At Home/Chez Soi (AHCS) project with respect to its wider impact on homelessness policy in Canada and internationally. Using a qualitative case study approach with 15 key informant interviews (with project leaders and decision-makers) and archival data, we examined the strategies adopted to achieve sustainability of the Housing First (HF) programs implemented during this demonstration project. In particular, we focused on the impacts that these strategies had on national policy. Four main themes emerged: (1) the impor- tance of evidence that was both rigorous and contextually relevant; (2) the value of framing the evidence in a way to achieve maximum impact in the decision-making context; (3) the importance of strong researcher-decision- maker relationships, which evolved through an integrated knowledge transla- tion approach; and (4) the value of resources and expertise provided by key stakeholders. A subsidiary theme was the importance of timing. The change in federal policy was that as of 2015, the 10 largest Canadian communities were to allocate 65% of their federal funding to HF programs for chronically and episodically homeless persons, and the remaining 41 communities and Aboriginal communities were to allocate 40% of their funding to HF programs. ISSN 2030-2762 / ISSN 2030-3106 online