Effects of the terms of trade on the bilateral exchange rate of New Ze
aland and Australia and of each of these countries with the USA are ev
aluated. There is strong evidence of cointegration of the exchange rat
es and a ratio of the respective national price levels when the relati
ve terms of trade of the countries are included in dynamic models. Whi
le evidence that the long-run equilibrium relationships satisfy purcha
sing power parity is mixed, relative improvement of a country's terms
of trade results in real appreciation of its currency in all cases. Th
e terms of trade are also found to be exogenous for the parameters of
the long-run New Zealand Australia exchange-rate equilibrium.