@article{ref1,
title="The role of random assignment in social policy research",
journal="Journal of Policy Analysis and Management",
year="2009",
author="Pirog, Maureen A.",
volume="28",
number="1",
pages="164-165",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0276-8739",
doi="10.1002/pam.20407",
url="http://dx.doi.org/10.1002/pam.20407"
}