Professor Lehmann teaches several different marketing courses. His research focuses on individual and group choice and decision making, the adoption of innovation and new product development, and the management and valuation of marketing assets (brands, customers). He is also interested in knowledge accumulation, empirical generalizations and information use. Lehmann has published more than 100 articles and books, serves on the editorial boards of several academic journals and is the founding editor of Marketing Letters. He is a past president of the Association for Consumer Research, former executive director (1993–1995, 2001–2003) of the Marketing Science Institute, and former co-editor of the International Journal of Research in Marketing.