Does devolution really boost growth?

Photo by Dominic Lipinski/Getty Images Keir Starmer wants the UK to have the highest rate of economic growth in the G7. It's the first of his five "national missions", announced last week. Yesterday he set out some of the tools Labour would use in government to try to jumpstart Britain's anaemic economy: £28bn a year of green investment and an £8bn National Wealth Fund; a promise to implement procurement practices to privilege domestic industries and local supply chains to "buy, make and sell more in Britain"; an Industrial Strategy that promises "partnership" between business, unions and the state; reform of…