By Olivier Blanchard, Jonathan D. Ostry, and Atish R. Ghosh

International policy coordination is like the Loch Ness monster: much discussed but rarely seen. Going back over the decades, and even further in history to the period between the Great Wars, coordination efforts have been episodic.

Coordination seems to occur spontaneously in turbulent periods, when the world faces the prospect of some calamitous outcome and the key players are seeking to avoid cascading negative spillovers. In quieter times, coordination is rarer—though not unheard of; the Louvre and Plaza accords are examples.

Today, policy coordination has resurfaced as a hot topic: while the worst of the global financial crisis is behind us, no one would claim that a return to “Great Moderation” is in the cards, and policymakers around the globe appear worried about policy transmissions across many dimensions.

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