Patricia Ingraham, “Of Pigs in Pokes and Policy Diffusion: Another Look at Pay for Performance”, Public Administration Review 53 (1993), pp. 348–56; Christopher Hood and Guy Peters, “The Middle Aging of New Public Management: Into the Age of Paradox?” Journal of Public Administration Research and Theory 14, no. 3 (2004), pp. 267–82; Chinitz and Rodwin, “What Passes and Fails as Health Policy and Management”, pp. 1113–26.