Kohr taught economics and political philosophy at Rutgers University, New Jersey, from 1943 to 1955. From 1955 to 1973, he was professor of Economics and Public Administration in the University of Puerto Rico, in San Juan, except for a period in 1965-66 when he was professor of Economics at the University of the Americas in Mexico City, Mexico; during these years he developed his concepts of village renewal and traffic calming, and "lent his advice to local city planning initiatives." He also advised the independence movement of the nearby island of Anguilla.