多年以前我曾以一种完全价格弹性和固定货币供给的假想世界模型对此做过解释。

Many years ago I tried to explain this by considering a hypothetical world of perfectly flexible prices and a fixed money supply.

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比如，前例中假想杂志的读者均来自理想人群，因而获得的结果是不同读者群之间的价格比较。

For example, the previous example involving hypothetical magazines with readers exclusively in the desirable demographic segments yields one price comparison for reader segments.

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