How three-arm random assignment within sites can improve non-experimental cross-site estimates of the relationship between program characteristics and impact
This paper will describe the logic and performance (in simulations) of the CAMIC method, using the Health Profession Opportunity Grants (HPOG) evaluation as an example of its potential to expand policy learning when evaluators and policymakers seek ways to improve—not just assess, up or down—studied social programs. Examining impact variation across sites in an attempt to learn which program components lead to larger impacts is something of obvious policy importance.