Rules for Correcting External Imbalances

Three aspects to adjustment are sufficiently distinct to be treated separately. The first is the balance of payments concept that is to be adjusted. The candidates are the overall balance of payments, the “basic balance”, and the current account balance. The latter is the preferred concept; specifically, all countries should aim to keep their current balances within a range of +/− 3% of GDP. The second are the instruments to be used to adjust a payments imbalance. The basic analyses are due to Hume and Meade, for the cases in which the country respectively does not and does use variations in the exchange rate as an instrument to facilitate the adjustment process. The third relates to the question of whether the international community should build some mechanism, besides the threat of reserve depletion, that will encourage its members to pursue adjustment. Most deficit countries already have an incentive to adjust. In contrast, the incentives for surplus countries to adjust are weak and need strengthening, perhaps by permitting trade retaliation for an undervalued exchange rate through the WTO or perhaps by taxation. The United States are the most difficult case because the construction of a suitable incentive for this country would probably be dependent on reform of the reserve supply mechanism.