Ruth P. Stevens consults on customer acquisition and retention, for both consumer and business-to-business clients. She has held senior marketing positions at Time Warner, Ziff-Davis, and IBM, as well as two Internet startup companies. Ruth teaches graduate students at Columbia Business School, and is past chair of the Business-to-Business Council of the DMA. Crain's BtoB magazine named Ruth one of the 100 Most Influential People in Business Marketing in 2002. She is the author of 2 business books: The DMA Lead Generation Handbook, and Trade Show and Event Marketing. Ruth serves as a director of Edmund Optics, Inc. She has studied marketing management at Harvard Business School and holds an MBA from Columbia University.