In the 2000s, a series of academic papers showed that corporate America had become a much less comfortable place for incumbents. Lots of people in corporate America already knew this, but it was helpful to see peer-reviewed evidence: L.G. Thomas and Richard D’Aveni found big increases in profit volatility among manufacturing companies from 1950 to 2002. Diego Comin and …

  Al Qayyarah / AFP Iraqi paramilitary forces launched an operation on Saturday to retake Tal Afar from the IS group, opening a new front in the nearly two-week-old offensive to recapture extremist-held Mosul. Forces from the Hashed Al-Shaabi, a paramilitary umbrella organisation dominated by Iran-backed Shiite militias, have largely been on the sidelines since the launch of the Mosul operation. …

  Bangui / AFP Twenty-five people were killed, six of them gendarmes, in two days of violence around the town of Bambari in the troubled Central African Republic, the UN force MINUSCA said on Saturday. Six police and four civilians were killed in an ambush by armed men Friday morning, while on Thursday, 15 people died in fighting on the town’s …