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Your example is exactly comparing the economies by PPP, without taking into account the exchange rates. The point is that if you establish trade between economi
by tomp 12y ago
Your example is exactly comparing the economies by PPP, without taking into account the exchange rates. The point is that if you establish trade between economies A, B, and C, people in A would figure out they can get a better deal by buying computers from B, hence the exchange rate would rise, and B$ will be worth A$10 or so. And $C will inflate rapidly, with the government eventually going effectively bankrupt.
- jvm 12y agoPoint taken, but you could imagine a state of affairs where the costs of trade are so high that the imbalanced prices do actually represent equilibrium, e.g. imagine tariffs are 100,000% and well-enforced. In the real world non-zero exchange costs are the reason why price differences across countries for identical goods aren't just immediately arbitraged away.