Eucken thus developed his theory of market forms by leaning heavily on Stackelberg, who juxtaposed two basic types of economic systems—a centrally directed economy and a market economy—with a large number of theoretically possible variations. However, Eucken only posited a market economy framed by a political order that he considered economically viable and amenable to human beings.

Philip Mirowski & Dieter Plehwe (eds.), The Road from Mont Pèlerin, loc. 532