The Impossible Trinity doctrine still holds a powerful sway over policymakers, advisors (particularly the International Monetary Fund [IMF]) and academia. In East Asia over the past decade, however, most countries have been able to maintain open capital markets, monetary policy independence, and...

Sudden capital outflows were at the heart of the 1997-98 Asian crisis. Ten years later, capital flows are back on the policy agenda, but in a very different context. The countries of East Asia are now getting more inflows than they can effectively absorb and the upward pressure on exchange rates...

A crisis provides an opportunity to examine how an economy works under pathological conditions. What are the lessons? Markets work well most of the time. That said, the global financial crisis has weakened faith in the market's self-equilibrating qualities. Fiscal policy works well to offset...

While the initial certainty and stark simplicity of the Impossible Trinity have fuzzed and softened over time, this idea still holds a powerful sway over analysis of exchange rates and in the policy debate on capital flows. Yet the practical evidence suggests that the constraints on policy...