Homeless study: http://www.jrf.org.uk/publications/support-rough-sleepers-lo...
Experimental evidence from Uganda: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2268552
An Experimental Assessment of the Women’s Income Generating Support (WINGS) Program in Uganda: http://www.poverty-action.org/sites/default/files/wings_full...
OECD study "Just Give Money to the Poor - The Development Revolution from the Global South": http://www.oecd.org/dev/pgd/46240619.pdf
It's a bit harder to find as they're not at the bottom of the article where they usually are. But the author of the article did cite several studies. Did you choose to ignore them?