For citations:
Frenkel A.A., Tikhomirov B.I., Volkova N.N., Surkov A.A. Impact Assessment of the Real Sector and Non-Productive Spheres on the Dynamics of the Business Activity Index. Finance: Theory and Practice. 2019;23(2):117-133. (In Russ.) https://doi.org/10.26794/2587-5671-2019-23-2-117-133