Mangowalk

40. For mutually beneficial trade to be possible between two countries, the two countries must have
(1) different productivity in production
(2) different opportunity costs in production.
(3) different absolute advantages in production.
A
(2) only
B.
(1) and (2) only
C.
(1) and (3) only
D.
(2) and (3) only

Why A but not B?I thought equal productivity implies equal opportunity cost in production,I need help plz

ehbb

同一生產能力唔代表同一貨物
亦都唔代表對方有相關需要?
而opportunity cost先係真正反映背後自身代價(成本)考慮?

Mangowalk

but equal productivity implies equal opportunity cost in production?

Mangowalk

but equal productivity implies equal opportunity cost in production?

williamEX

Productivity 係講緊兩個國家鬥Resource/output 比例
Opportunity cost 係講緊兩個國家鬥 output 1 / output 2
absolute advantages 又係講緊兩個國家鬥Resource/output 比例

所以答案咪係(2) only