Conscious uncoupling

WHEN Vladimir Putin was bribing Viktor Yanukovych, then the president of Ukraine, to turn down a trade deal with the European Union last year, one of the sweeteners was cheap gas. The copious Russian gas Ukraine burns through every year—it is a profligate user of energy—would be priced at just $268.5 per thousand cubic metres (tcm), which for 2013’s total of 28 billion cubic metres (bcm) works out at $7.5 billion. Since February’s revolution ousted Mr Yanukovych, gas has become a stick, not a carrot. On April 1st Alexei Miller, the chief executive of Russia’s gas giant, Gazprom, said that the price of Ukraine’s gas was going up by 44%, to $385.5 per tcm.

This is ominous news for Europe. Ukraine already owes Gazprom $1.7 billion, according to Mr Miller. If Ukraine continues not to pay its bills—and without outside help, it cannot—Gazprom can cut it off. Such a dispute need not, in principle, have any effect on the gas that flows through Ukraine to other countries farther west (see map). But if Gazprom reduces the flow of gas to reflect the fact that Ukraine no longer has a right to its 28bcm, and Ukraine takes some of that gas anyway, or if Gazprom shuts...