TY JOUR TI ECONOMIC RISK MANAGEMENT IN THE FIELD OF TRANSPORT SERVICES KW crisis management KW service sector KW service KW pricing KW marketing mix model 8Р KW package price KW transport company KW system approach KW key performance indicators KW balanced scorecard system KW aggregate economic risk KW method of expert evaluations JO Russian Journal of Management AU Barchukov, A.. AU Feschenko, I.V. AU Simonenko, A.V. AU Simonenko, E.V. PY 2017 IS 5 PB Publishing Center RIOR