Daniel is professor at the Mercatus Center, George Mason University. He published research on policy issues including toll roads, urban transit, auto emission, credit reporting, and the Food and Drug Administration. Daniel also has written about spontaneous order, coordination, the discovery of opportunity, the demand and supply of assurance, why government officials believe in the goodness of bad policy, and many other topics. He wrote the book Knowledge and Coordination: A Liberal Interpretation. Klein holds degrees from George Mason University and New York University because of the study of classical liberal traditions of economics.