This paper develops a testable intertemporal model of the current account t
hat allows for variable interest rates and exchange rates. These additional
variables are channels through which external shocks may influence the dom
estic current account. The restrictions from the theoretical model are subj
ected to present value tests using quarterly data from three small open eco
nomies. The paper finds that including the interest rate and exchange rate
improves the fit of the intertemporal model over what was found in previous
studies. The model predictions better replicate the volatility of current
account data and better explain historical episodes of current account imba
lance.