"The social process is really one indivisible whole. Out of its great stream the classifying hand of investigator artificially extracts economic theory.The designation of a fact as economic already involves an abstraction"
"Social facts are results of human conduct, economic facts results of economic conduct......The field of economic facts is thus first of all delimited by the concept of economic conduct."
"In this case ,economic life is represented by a special group of people, although all other members of society must also act economically"
"We are conderned with decribing the general forms of the causal links that connect economic with non-economic data"