This paper studies a new model of the estimation of the labor volumes used to produce every product within the input – output table. The annual data on average employment volume for Russian industries and matrices «MAKE», published by the State Committee of the Russian Federation on Statistics was used. These matrices, published in different years, were transformed to be compatible to each other.

The main hypothesis made is that the labour -output ratio for every product i made in the industry j (i # j) can be expressed as weighted average of the known average labour – output ratio in the industry jand the profile labour – output ratio in the industry i – the value to be found. The weights are the same for every product, but differ from year to year. The path of this weights through the time was determined using multiple criteria, measuring from different positions the time variability of the labour volumes calculated with this weights.