1. The Lasting Benefits Study (LBS) in Grades 4 and 5 (1990-1991): A Legacy from Tennessee's Four-Year (K-3) Class-Size Study;C M Achilles;Project STAR. Paper #7,1985
2. Reality Check: Can the Effects of Home Visiting Programs found in RCTs be Replicated in the Real World? Boyd-Zaharias;K Bobbitt;American Educator,1999
3. A Practitioner's Guide to Cluster-Robust Inference;A C Cameron;Journal of Human Resources,2015
4. Reforms as experiments;D T Campbell;American Psychologist,1969