DIANE COYLE
© VECTORPOT/REX SHUTTERSTOCK
The attention of officials in Brexit Britain is focused, laser-like, on productivity. Away from the world of policy and economics, the term washes over most people as business-speak. For those responsible for policy, however, productivity is not just an important question: it is the question. The Chancellor’s Budget red book—and his scope for spending more on the pressing demands he’s juggling— is framed by estimates about where productivity is heading. That’s because virtually all his numbers are affected by the forecasts of the independent Office for Budget Responsibility (OBR) for growth, which in turn depends on its assumptions about productivity.