An evaluation of income incentives and board-certification trends.

In this paper the author examines income differentials between board-certified and non-board-certified physicians to determine whether the trend toward board certification is consistent with economic incentives. Although simple income comparisons indicate substantial differentials by certification status, after adjustments are made for specialty-mix, age distribution, and hours worked, the remaining differential is small. However, results by specialty indicate that physicians are most likely to become certified in specialties with the largest income differentials.