He, Yinghua, Brendan O'Flaherty, and Robert Rosenheck (2010), "Is shared housing a way to reduce homelessness? The effect of household arrangements on formerly homeless people." Journal of Housing Economics, 19(1), 1-12.

Most single adults share housing with other adults, and living alone is considerably more expensive than living with someone else. Yet policies that discourage shared housing for formerly homeless people or people at risk of becoming homeless are common, and those that encourage it are rare. This would be understandable if such housing adversely affected its users in some way. We ask whether shared housing produces adverse effects. Our provisional answer is no. For the most part, whether a person lives alone or shares housing seems to make no difference to the outcomes we studied although shared housing is associated with reduced psychotic symptomology. We use data from ACCESS, a 5-year, 18-site demonstration project with over 6000 formerly homeless individuals as participants.