The biggest weakness of PPP is that the equilibrium is only a very long-run one, as it completely ignores capital flows.
PPP的最大弱点在于，其平衡只存在于非常久远的长期，而且它完全忽略了资本流动。
Thus the very long-run course of prices has almost always been upward.
因此，从很长的时期来看，价格差不多总是向上的。
Thus the very long-run course of prices has almost always been upward.
因此，从很长的时期来看，价格差不多总是向上的。
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