This criticism is also the core of the last documented intellectual interaction between Clark and Kapp, via Clark's book review of “Social Costs of Private Enterprise” in the Yale Review entitled "The New Economic Community”. In it Clark praised the systematic elaboration of the idea that an “ ‘enterprise’ should reckon with all the costs it occasions, including those the business unit can shift to other members of society." And with regard to neoclassical economics "if one man's at is another man's camel Kapp presents theorists with evidence of the size of the camels they have been swallowing However, Clark also raised questions: "has Kappl at certain points, charged as costs of private enterprise things that are really costs of modern methods of production under any form of organization is there a sound basis for presuming that a socialist government would treat these matters more justly than they are treated by a state which combines ‘private enterprise’ with many sided welfare policies? Is a municipality more likely to abolish the smoke nuisance from its own plant than to order a private plant to do the like?" Clark concluded that while questions remained, Kapp’s book was important because it brought together ample empirical evidence for the existence of social costs, suggesting the scope and magnitude of the problem (Clark 1950: 173-174)