Unionism and Licensing of Public School Teachers: Impact on Wages and Educational Output

Morris M. Kleiner and Daniel L. Petree, When Public Sector Workers Unionize (University of Chicago Press, 1988), chap. 11, https://www.nber.org/books-and-chapters/when-public-sector-workers-unionize/unionism-and-licensing-public-school-teachers-impact-wages-and-educational-output.