Tác giả: Seymour Sudman

Norman M. Bradburn is the Tiffany and Margaret Blake Distinguished Service Professor emeritus psychology, at the Harris Graduate School of Public Policy and the Graduate School of Business at the University of Chicago. He was a senior vice president at the National Opinion Research Center. Seymour Sudman was a Walter H. Stellner Distinguished Professor of Marketing and deputy director and research professor at the Survey Research Laboratory at the University of Illinois, Urbana-Champaign. Professor Sudman died in 2000. Brian Wansink is Professor of Marketing, Nutritional Science, Advertising and Agricultural and Consumer Economics at the University of Illinois Urbana-Champaign. He is also Research Professor at Cornell University and at Wageningen University in the Netherlands.