Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The American Board of Medical Specialties (ABMS) mandates Maintenance of Certification (MOC) exams every ten years to improve patient care and physician skills, but some states consider it expensive and burdensome and have introduced anti-MOC laws. We exploited state-level staggered adoption of anti-MOC laws and found an additional 1.4–1.9 percentage point biannual increase in older physicians aged 60+ in states with anti-MOC laws, with no effect on younger physicians under 60. Our study suggests that anti-MOC laws improve the supply of older physicians.