Don R. Hansen is Arthur Andersen Professor of Accounting and a Regents Service Professor at Oklahoma State University. He received his Ph.D. from the University of Arizona in 1977. He has an undergraduate degree in mathematics from Brigham Young University. His research interests include activity-based costing and mathematical modeling. He has published articles in both accounting and engineering journals including The Accounting Review, The Journal of Management Accounting Research, Accounting Horizons, and IIE Transactions. He has served on the editorial board of The Accounting Review. His outside interests include family, church activities, reading, movies, and watching sports.