Labor Supply Effects of Occupational Regulation: Evidence from the Nurse Licensure Compact

There is concern that state licensure requirements impede efficient mobility of licensed professionals to areas of high demand. Nursing has not been immune to this criticism, especially in the context of perceived nurse shortages and large expected future demand. The Nurse Licensure Compact (NLC) was introduced to solve this problem by permitting registered nurses to practice across state lines without obtaining additional licensure and making licensure easier to obtain for nurses moving between member states. We exploit the staggered adoption of the NLC across states and over time to examine whether a reduction in licensure-induced barriers alters the nurse labor market. Using data on over 1.5 million nurses and other health care workers from the 1990 and 2000 Census and the 2006-2012 American Community Surveys as well as data from the 1992-2012 Current Population Survey, we estimate the effects of NLC adoption on labor supply and commuting outcomes. We find no evidence that the labor supply or mobility of nurses increases following the adoption of the NLC, even among the residents of counties bordering other NLC states who are potentially most affected by the NLC. This suggests that nationalizing occupational licensing will not substantially reduce the labor market frictions caused by occupational regulation.