Paul Green

Paul E. Green earned a bachelor's degree in mathematics and economics and master's and doctoral degrees in statistics, all at Penn. He joined the faculty in 1961. Green, who retired in 2005, earned his bachelor’s degree in mathematics from Penn, then spent 12 years working in industry, including stints at Sun Oil, Lukens Steel, and DuPont, while also completing his PhD at Penn. Green’s years in industry provided the real-world direction his research would ultimately become famous for. In 1962, Green left DuPont to work full-time in Wharton’s Marketing Department. Two years later, Green came up with the idea and the name for conjoint analysis while reading a research article from a mathematical psychology journal that provided a new system to measure rank order data. He is survived by daughters Patricia A. Rush and Carol Rickard; a son, Kenneth P. Green; a sister; five grandchildren; and five great-grandchildren. His wife, Elizabeth "Betty" Green, preceded him in death.