Walter Friedman serves as co-editor of Business History Review. He has a special interest in the history of marketing and personal selling, and is author of Birth of a Salesman: The Transformation of Selling in America (Harvard, 2004). He is also interested in the history of economic thought and his most recent project is to trace the development of economic forecasting theories from the mid-nineteenth century to the present. He has recently published in the journal Business History (UK) and in Harvard Magazine.