D:economic interdependenceD:gains from tradeD:concaveD:Factor-price equalization theoremD:Heckscher-Ohlin theoryD:Decrea 点我阅读全文
D:macroeconomicsD:basis for tradeD:marginal rate of transformation (MRT)D:Factor-endowment theoryD:TelevisionsD:Effectiv 点我阅读全文