In the national economies of those not yet prepared to allow more flexibility in their effective exchange rates, it creates the risk of growing distortions in the allocation of resources, conflict with domestic monetary policy objectives, and the risk of larger and more abrupt future movements in the exchange rate. These four broad forces will have substantial implications for the macroeconomic performance of the world economy over the medium term. This combination of fiscal sustainability problems, large external imbalances, and the tension in the existing exchange rate system creates the risk of unanticipated shocks to financial prices, even in a context where monetary policy credibility is strong. The probability of these shocks may be low, but it is higher than it has been, and higher than we should be comfortable with. These shocks could be large enough to lower future growth outcomes. The world’s economies have very different capacities to comfortably manage the inevitable adjustments. Without policy action commensurate with the challenges, we face some risk, it may not be high, but it is material, of a world with somewhat lower growth performance and higher volatility. Although the United States has the distinction of presiding over the more awkward combination of imbalances, it is in many ways in a better position than other countries to manage successfully through this period. Our underlying fiscal position is stronger, our debt to GDP burden lower, our demographic cliff more moderate, and our trend growth rate substantially higher than that of the other major economies.
This dynamic will test the ability of governments to sustain commitment to an open multilateral trading system, and the manner in which this plays out will have an important impact on future productivity gains. A fourth challenge involves prospective changes in the global exchange rate regime. The international monetary system now incorporates an uncomfortable disparity in the extent to which real effective exchange rates vary across regions. The monetary authorities of the United States and Europe allow considerable variability in their real exchange rates, though they are not indifferent to movements in exchange rates. Japan has somewhat less enthusiasm for flexibility and runs a regime in which it seeks to avoid large swings in the value of their currency. Emerging market economies run a mix of regimes from those that permit significant flexibility to those that run essentially fixed pegs or regimes that seek to contain variations to relatively small degrees around implicit targets for their currencies against the dollar or a basket of the currencies of their major trading partners. The world has lived with this system for some time. But this is not an ideal mix, either for the monetary system as a whole, or for those countries which permit very little variability in their real effective exchange rates, and it’s probably not sustainable over time. It also is not ideal because it limits the extent to which markets work to facilitate adjustment. It creates the risk of larger moves in the major currencies than might otherwise be the case.