Peter M. Kettner is Professor Emeritus at the Arizona State University School of Social Work. He is the author of six books, 50 articles, monographs, and book chapters on the topics of purchase-of-service contracting, privatization, macro practice in social work, human services planning, and social work administration. Over his 30 year career in academia he served as a consultant to five different state human service agencies and dozens of local nonprofit agencies on their purchase of service contracting practices and in the design and implementation of effectiveness-based planning systems. In retirement he has continued his writing and consultation with local government and nonprofit agencies.