A plea for interdisciplinarity (Hayek's quote)

he who is only an economist cannot be a good economist. Much more than in the natural sciences, it is true in the social sciences that there is hardly a concrete problem which can be adequately answered on the basis of a single special discipline.

-- Hayek, 1967

p. 267 in Studies in Philosophy, Politics and Economics, pp.251–269. Chicago: University of Chicago Press.