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Time for Common Digital Currency?
World Economy

Time for Common Digital Currency?

Today’s world is more economically and financially integrated than at any time since the latter half of the nineteenth century. But policymaking–particularly central banking–remains anachronistically national and parochial. Isn’t it time to rethink the global monetary (non)system? In particular, wouldn’t a single global central bank and a world currency make more sense than our confusing, inefficient, and outdated assemblage of national monetary policies and currencies?
Technology is now reaching the point where a common digital currency, enabled by near-universal mobile phone adoption, certainly makes this possible. And however farfetched a global currency may sound, recall that before World War I, ditching the gold standard seemed equally implausible, Alexander Friedman wrote for Project Syndicate.
The current system is both risky and inefficient. Different monies are not only a nuisance for tourists who arrive home with pockets full of unspendable foreign coins. Global firms waste time and resources on largely futile efforts to hedge currency risk (benefiting only the banks that act as middlemen).
The benefits of ridding the world of national currencies would be enormous. In one swoop, the risk of currency wars, and the harm they can inflict on the world economy, would be eliminated. Pricing would be more transparent, and consumers could spot anomalies (from their phones) and shop for the best deals. And, by eliminating foreign-exchange transactions and hedging costs, a single currency would reinvigorate stalled world trade and improve the efficiency of global capital allocation.

 A By-Product
In short, the current state of affairs is the by-product of the superseded era of the nation-state. Globalization has shrunk the dimensions of the world economy, and the time for a world central bank has arrived.
The history of central banking, though comparatively brief, suggests that democratically derived legitimacy is possible only at the level of the nation-state. At the supra-national level, legitimacy remains highly questionable, as the experience of the eurozone amply demonstrates. Only if the European Union’s sovereignty eclipses, by democratic choice, that of the nation-states that comprise it will the European Central Bank have the legitimacy it requires to remain the eurozone’s sole monetary authority.
But the same political legitimacy cannot be imagined for any transatlantic or trans-Pacific monetary authority, much less a global one. Treaties between countries can harmonize rules governing commerce and other areas. But they cannot transfer sovereignty over an institution as powerful as a central bank or a symbol as compelling as paper money.

 Tough Decisions
Central banks’ legitimacy matters most when the stakes are highest. Everyday monetary-policy decisions are, to put it mildly, unlikely to excite the passions of the masses. The same cannot be said of the less frequent need (one hopes) for the monetary authority to act as lender of last resort to commercial banks and even to the government.
Yet the tough decisions that central banks must make in such circumstances–preventing destabilizing runs versus encouraging moral hazard–are simultaneously technocratic and political. Above all, the legitimacy of their decisions is rooted in law, which itself is the expression of democratic will. Bail out one bank and not another? Purchase sovereign debt but not state or commonwealth (for example, Puerto Rican) debt? Though deciding such questions at a supranational level is not theoretically impossible, it is utterly impractical in the modern era. Legitimacy, not technology, is the currency of central banks.

 Commitment Needed
The International Monetary Fund’s role as independent arbiter of sound macroeconomic policy and guardian against competitive currency devaluation ought to be strengthened. And, as Raghuram Rajan, the governor of the Reserve Bank of India, recently suggested, the IMF should backstop emerging economies that might face liquidity crises as a result of the normalization of US monetary policy.
Likewise, a more globalized world requires a commitment from all actors to improve infrastructure, in order to ensure the efficient flow of resources throughout the world economy. To this end, the World Bank’s capital base in its International Bank for Reconstruction and Development should be increased along the lines of the requested $253 billion, to help fund emerging economies’ investments in highways, airports, and much else.
For today’s international monetary system, the perfect–an unattainable single central bank and currency–should not be made the enemy of the good. Working within our existing means, it is surely possible to improve our policy tools and boost global growth and prosperity.

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