Speaking at the annual gathering of central bankers in Jackson Hole, Wyoming, many said that the global economy was entering a new and tougher era. “At least over the next five years, monetary policymaking is going to be much more challenging than it was in the two decades before the pandemic struck,” Gita Gopinath, the IMF’s deputy managing director, told the Financial Times. Cutting through the buoyant atmosphere among Jackson Hole attendees was the overarching concern that the world and the economic relationships that underpin it had fundamentally changed. Complicating matters are doubts about just how much policy tightening is needed in the face of unpredictable gyrations in supply and, in turn, prices. The next few years are at risk of being known as the “Great Volatility” — in contrast with the past two decades, which economists called the “Great Moderation” The 2 per cent inflation target came up repeatedly throughout the conference, with economists suggesting that it may n...