Rafael • February 4, 2025

【DSE ECON 2025】點解Elective 2會係更理想選擇

5年之後再考返 Elective 1重字 Elective 2重圖 您會點樣揀﹖

1. 事隔5年,2025起DSE ECON終於考返elective,想講其實elective 2教用圖睇trade,係鞏固international trade一課認知嘅一大里程


2. 無講係直線定曲線PPF,喺圖上面只要拼埋兩個經濟體,一眼就睇到comparative / absolute advantage,成個世界點解因trade 而變得美好,都係highly visible


Linear PPF - 直線PPF是指每件邊際成本在不同的產量都是一樣,呢啲情況下基本上將兩個國家PPF拼埋,平啲果條就係代表佢做你圖中正下方果種物品有比較優勢,如果每個國家只做集中資源做具比較優勢嘅物品,再透過貿易交換產出,產出會達最大化,所以將兩國只做具比較優勢產品的兩端連起來,就會得到條TOT


Concave to the origin PPF - 曲線PPF係指隨著某物品產量增加,每件邊際成本亦隨之增加,只要在曲線PPF上按題目提供的TOT畫一條tangent嘅線,再比對該國現時生產水平,倘在tangent前則該國做PPF下方的物品具比較優勢,相反在tangent後則為貿易夥伴做該物品較具競爭優勢


3. 揀elective有幾大準則,1係課嘢易唔易明、2係課嘢易唔易溫、3係課嘢喺臨場緊急狀況時易唔易handle、最後係課嘢同你之前學嘅有冇協同,綜合呢4樣,我會建議您揀Elective 2

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