TY JOUR TI Cost-effectiveness of experimental research at different stages of the construction project life cycle KW life cycle of a construction object KW experimental research KW economic efficiency KW construction costs KW operating costs KW reliability of buildings KW investment efficiency JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Turchak, A.E. AU Berdnik, A.A. AU Gulyakin, D.V. PY 2026 IS 0 PB ITBO University