1 While outreach as an intervention as such represents a cost of resolving homelessness, in some cases one might consider outreach a cost of homelessness, against which one could measure the associated decline in outreach costs for persons who are subsequently housed or placed in a program. Of course, because outreach is part of the interventions studied, it is appropriately considered as a cost of the interventions in comparison to doing no outreach. Where to show the costs of outreach will depend on the boundaries of the intervention studied.
2 We use the term "long-term" shelters to more directly refer to their functional role in the shelter system. Distinctions between transitional housing and emergency shelters are not always clear or obvious in practice, and sometimes reflect funding sources more than programmatic differences. Alternatively, long shelter stays can occur in both "emergency" and "transitional" facilities, although some facilities are disproportionately used for long stays than others (Culhane, Metraux, Park, Schretzman, & Valente, in press).