Modeling of integration processes in economy

The article presents the results of a research into integration processes in the economy of the Republic of Belarus and regions of the Northwestern Federal District of the Russian Federation. The authors tested an economic-mathematical model of regional development based on a complex-valued indicator. On the basis of the data obtained, the authors arranged the regions of the Northwestern Federal District by level of development in the context of economic integration; they allocated four groups. The results served as the basis for the development of a forecast of development of the regions under the conditions of economic integration for the period up to 2020.