He previously served as a postdoctoral fellow and visiting assistant professor at Duke University's Program on Values and Ethics in the Marketplace, where he was nominated for a teaching award. In addition, Daniels has taught at the University of Wisconsin, where he earned his doctorate in American history. He has lectured internationally on the history of American ethics, American business and entrepreneurship, and the American Enlightenment. He has appeared on C-SPAN's "American Writers" series and his articles have appeared in the Atlanta Journal-Constitution and the San Diego Business Journal. Daniels's other publications include a chapter in The Abolition of Antitrust and five entries in the Oxford Companion to United States History. Most recently, he co-authored the U.S. Economic Freedom Index, 2008 Report.