NIH Sponsored Training on Impact Evaluation Using Randomized Trials  In Partnership with Abdul Latif Jameel Poverty Action Lab Rigorous impact evaluation is a critical ingredient in evidence-based policy.Within the health sector, randomized controlled trials (RCTs) are considered standard practice in clinical research.However, evaluation of programs and policies to implement large-scale health interventions tend to be far less rigorous.Much of this is due to the fact that researchers, health practitioners and policymakers are sometimes unsure of how to reconcile the rigor of clinical trials with the uncontrolled diversity of the field, particularly when operating in a developing country context.