Economists, in stressing the prescriptive implications of their analysis, typically have ignored the potential contributions of their theorems and methodological principles to the understanding of human behavior as an end in itself. The purpose of the paper is to establish the principle, by detailed reference to the literature of economics, that the 'deductive pattern of explanation' constitutes a valid approach to the general study of human behavior. As such, it is a potentially useful method of analysis in the other social (...) sciences. Literature from the philosophy of social science bearing on the applicability of deductive theory to the study of human behavior is subjected to detailed critical analysis. (shrink)