Arnold Zellner (born January 2, 1927) is an American economist and statistician specializing in the fields of bayesian probability and econometrics. He is known for his pioneering work in the field of bayesian analysis and econometric modeling.
He earned his A.B. in physics from Harvard University in 1949 and his Ph.D. in economics from the University of California, Berkeley in 1957. He holds honorary degrees from the Autonomous University of Madrid in Spain, the Universidade Técnica de Lisboa in Portugal, the University of Kiel in Germany, and the Rotterdam School of Management in the Netherlands.
He is currently H.G.B. Alexander Distinguished Service Professor Emeritus of Economics and Statistics at the Graduate School of Business of the University of Chicago. He was the founder of the International Society for Bayesian Analysis and also served as president of the American Statistical Association in 1991.