Empirical studies report that there is a negative relationship between the spot difference and forward premium. This result violates the forward rate unbiasedness theory. Using standard regression we found that recent samples give mixed results with both positive and negative coefficients. One...

Empirical tests of purchasing power parity (PPP) are implicitly based on the conditions of symmetry and proportionality of the price coefficients. We investigate a separate condition, which we term homogeneity. Specifically, while there may be factors that drive a wedge between prices and...