UNIVERSITY OF ATHENS

The vast majority of pre-Classical and of many Classical economists thought that it was natural to incorporate value judgments and norms in their economic reasoning. However, there was a gradual dominance of the idea of a neutral or value-free economic science which gained momentum with the second Marginalist generation. More specifically, clear signs of this tendency can be found in the works of Sidgwick, Pareto and Fisher. The paper examines the process of this change and provides possible justifications. In particular, the work discusses this trend with reference to the growing influence of classical physics, and positivist philosophies of science. Consequently, the paper shows that there was a gradual broadening of the meaning of the term “value judgments ” to include mental states and motivations. These developments are essential in the understanding of the formation of the standard economic theory and especially of microeconomic theory