Kenneth Rogoff writes: the current international standard for breaking up a country is arguably less demanding than a vote for lowering the drinking age.

With Europe now facing the risk of a slew of further breakup votes, an urgent question is whether there is a better way to make these decisions. I polled several leading political scientists to see whether there is any academic consensus; unfortunately, the short answer is no.

For one thing, the Brexit decision may have looked simple on the ballot, but in truth no one knows what comes next after a leave vote. What we do know is that, in practice, most countries require a “supermajority” for nation-defining decisions, not a mere 51 percent. There is no universal figure like 60 percent, but the general principle is that, at a bare minimum, the majority ought to be demonstrably stable. A country should not be making fundamental, irreversible changes based on a razor-thin minority that might prevail only during a brief window of emotion. Even if the UK economy does not fall into outright recession after this vote (the pound’s decline might cushion the initial blow), there is every chance that the resulting economic and political disorder will give some who voted to leave “buyer’s remorse.” [Continue reading…]

A UK petition calling for a second EU referendum has already received over two million signatures.