2450, "relative prices at the retail level across countries, expressed in a common currency, comove closely with the nominal exchange rate" " because of certain economic forces that may cause retail prices to differ between countries and because of crossborder costs that cannot be arbitraged using the exchange rate.
Esto se debe a que algunas fuerzas económicas pueden causar que los precios al menudeo difieran entre países y a los costos transfronterizos que no pueden ser arbitrados por el tipo de cambio.