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A theory which states that the rate of exchange between two currencies is in equilibrium when it exactly reflects the difference in cost of standard goods in the two countries. If the same radio costs £100 in the UK and $150 in the US, there is purchasing power parity if the exchange rate is £1=$1.5 and the radio costs effectively the same amount in both countries. Purchasing power parity cannot apply to immobile goods such as houses and it does not take into account distortions caused by transport costs and trade restraints, so standard goods that are widely available in both countries are used as a measure.

参见 see also 购买力平价

更新时间: 2009-11-15