TY JOUR TI QUANTITATIVE ANALYSIS OF INVESTMENT PROCESSES IN REGIONS USING THE METHOD OF ENVELOPES KW regional analysis KW investment cycles KW mathematical modeling KW envelopes KW geographical environment of economic activity KW economic crisis JO Bulletin of Kemerovo State University. Series: Political, Sociological and Economic sciences AU Myadzelets, A.V. AU Cherkashin, A.K. PY 2017 IS 2017 PB Kemerovo State University