Martin R. West, written statement to U. S. Senate Committee on Health, Education, Labor, and Pensions, January 21, 2015, http://www.help.senate.gov/imo/media/doc/West.pdf, and David J. Deming et al., “When Does Accountability Work?” educationnext.org (Winter 2016), pp. 71–76. On Florida, David N. Figlio and Lawrence S. Getzler, “Accountability, Ability, and Disability: Gaming the System”, NBER Working Paper No. 9307, October 2002.