this task Is comportant and necessary.- How~ver. at present we are Interested In real growth of Income en:5ur_ed by the existing volume of prouctlon resources. That Is why It Is necessary to assure stable prices and evaluations while determining the national economic effect. Apparen~ly a five-year period represents normal limits within which one may carry out such evaluations. An Important pecularlty of calculations of the national economic effect done on the basts of Formula (6) consists In the fact that they are considered to be an Integral part of a more general task-formation of the best variant of national economy plan. This Is conditioned by the fact that the calculation of the national economic effect Is based on a system of economic normatlves reflecting target objectives of the plan. In this sense. the plan and normatlves constitute a single unity: during the process of lnterated procedure of elaboration of the ,best variant of planned decision the corresponding normatlves are being established. With the framework of a new five-year plan the system of economic normatlves represents an Initial basis for calculation of the national economic effect. They help to ldentl·fy the most efficient variants of production of development from the national economy point of view. The Interrelation of methods of calculating the effect with the plan makes It posslle to use It as a general lzed Indicator of efficiency for alI levels of economic management. From the point of view of Its economic content the Indicator of national economic effect represents An Increment Q£ aat e,onom!t profit. While analysing operation of separate economic projects the Indicator of net profit growth for each project can be Integrated to produce a single general lzed Indicator for the national economy as a whole. In calculations one may use an Indicator of ful 1 national 
**Analysis**
The text appears to be discussing economic concepts and strategies, specifically related to planning and evaluation of national economic effects. It mentions the calculation of a national economic effect, the use of economic norms, and the identification of efficient variants of production. The text also references a five-year plan and the concept of national economic profit. These indicators suggest that the text is focused on economic development and planning, rather than other categories.

**Category**
Economic development