TY JOUR TI REGRESSION MODELS OF ASSESSING INFLUENCE OF ECONOMIC INDICATORS ON AMOUNT OF SERVICES IN INFORMATION AND COMMUNICATION TECHNOLOGIES KW information and computer technologies KW amount of import and export KW regression model KW model competition KW adequacy criteria KW oil KW petroleum products and natural gas KW gross domestic product JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Noskov, S.I. AU Vergasov, A.. PY 2021 IS PB Astrakhan State Technical University