In this article we present the ideas proposed/addresses during the initial development of interindustry interaction model, which due to various reasons were not implemented in empirical research of the USSR economy. We analyze current studies and the underlying data, which provide an opportunity for continuation of research of interindustry interaction model, particularly in the direction entailed by the heterogeneous output assumption. We admit that the amount of inputs of an industry is related to the structure of its outputs market and propose the estimation method for the «core» product flows of the model. Our approach is illustrated with the help of experimental 25- industry input- output tables (1980–2004) in basic prices (2000) data provided by Institute of Economic Forecasting RAS.