`` British philanthropist Lynn Forester de Rothschild is weighing up the sale of a stake in The Economist in the biggest shake-up of the magazine’s ownership in a decade. `` `` Lady de Rothschild has hired advisers at Lazard to explore selling roughly a 20pc stake for as much as £400m, according to Bloomberg. `` ```` The American-born businesswoman is said to be reviewing her holding in The Economist as part of a wider assessment of her investment portfolio. `` `` Any sale would represent the most significa ...