Dr. Gruen's research focuses on the management of customer relationships and he is most well known in academic circles for his work in relationship marketing. His current research interests include retail out-of-stocks, category management, sales and marketing outsourcing, post-audits, supplier-retailer scorecards, customer-to-customer value creation, and applications of service-dominant logic. His research has been widely published in highly respected journals including the Harvard Business Review, Journal of Marketing, Journal of the Academy of Marketing Science, Journal of Retailing, Journal of Business Research, Journal of Applied Psychology, Journal of Operations Management, and ECR Journal/International Commerce Review. Among industry circles, Dr. Gruen is most well-known for his research and expertise on out-of-stocks of fast-moving consumer goods. From 2000-2007, he served as the primary investigator for two major research grants from the Procter & Gamble Corporation, and led the international research project team that produced “Retail Out-of-Stocks: A Worldwide Examination of Extent, Causes, and Consumer Responses,” in 2002. Along with his research partner from the IE Business School in Madrid, Spain, Dr. Daniel Corsten, he completed a follow-up study titled “A Comprehensive Guide to Retail Out-of-Stock Reduction in the Fast-Moving Consumer Goods Industry,” published in 2008. His work on retail out-of-stocks has become the industry standard, and he is frequently invited to speak on the topic of retail out-of-stocks to audiences world-wide. At UNH, Dr. Gruen teaches the core marketing management course for the MBA and Executive MBA programs. At UCCS, he taught e-commerce and marketing strategy to Executive MBA, MBA, and undergraduate classes. While at Emory, he taught Customer Relationship Management and Marketing Research to MBA classes as well as in executive education programs. In addition to the above responsibilities, he has served as a Visiting Professor at ESCP in Paris, France, and provides regular executive teaching for TKK Executive Programs of Helsinki, Finland. Tom currently lives with his family in Portsmouth, New Hampshire.