There is a new understanding of the category “Economic value” . According to this interpretation, economic value is an integrity of economic usefulness and economic expenditures.

Usefulness and expenditures are viewed as contradictory, relative categories that immanently imply each other as contradictory moments of dialectic integrity. They are represented as specific relation of man towards limited wealth involved in his practical activity. On the basis of a new understanding of economic value an attempt is made to describe law of increasing marginal expenditures as a reverse side of law on decreasing marginal usefulness. An original interpretation of global and local criteria of optimality as well as economic mechanism of measuring usefulness and expenditures is offered. There are some other interesting ideas that issue from the teleological understanding of man’s activity. They are in agreement with provisions and principles of econometrics.