Most studies attempting to make comparisons between public and private prisons find that private prisons are more effective and save money, determine there is little difference between the two, or that the comparisons are inconclusive. Studies which determine that private prisons save money are usually underwritten by the private corrections industry. Studies which conclude that cost savings are difficult to determine and savings are nominal are usually conducted by independent agencies such as the U.S. Government Accountability Office (GAO). Studies conducted by the Arizona Auditor’s Office, and the University of Utah Criminal Justice Center appear to meet the criterion of being independent. As someone who has studied prison privatization extensively, I find that disparate research findings highlight the inability to make an apples-to-apples comparison between public and privately-run prisons. Readers of such research promulgating private prisons as superior should read with skepticism any findings that suggest apples-to-apples comparisons are made between public and private prisons.