TY JOUR TI The importance of Lerner's equivalence theorem for determining the consequences of trade policy changes KW import duty KW export duty KW weakening of competition KW consumer purchasing power KW world economy KW trade relations KW international trade KW national industry KW market equilibrium JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Kirillov, V.N. PY 2025 IS 0 PB ITBO University