This study estimates the intertemporal model for the relationship between imports and exports and examines the sustainability of CADs and validity of IBC for a comprehensive set of 24 OECD countries. The balanced panel data model is estimated using several single-equation and system estimators to assess the robustness of results across methodologies and test statistics. The study finds that the numerical magnitude of the slope parameter of imports is close to unity consistently across estimators. The standard panel data estimators provide consistent support for the sustainability of CADs and validity of IBC. The optimal FMOLS and DOLS estimators cross-validate the evidence and reinforce the sustainability of CADs. The residual-based single-equation and the VAR-based system cointegration estimators provide consistent support for the long-run equilibrium relationship between imports and exports. The support for the sustainability of CADs suggests that the current account deficits are only short-run phenomena and are balanced by future surpluses. The macroeconomic stabilisation strategies seem to have been effective in correcting the market failures and maintaining the steady-state equilibrium relationship between the inflow and outflow of resources.