Why is there still so little diversity among film directors?

IN THIS week’s episode of “The Economist asks”, we speak with Chiwetel Ejiofor. After earning an Oscar nomination for his performance in “12 Years a Slave”, he has turned his hand to directing. His first film, “The Boy Who Harnessed the Wind”, tells the true story of William Kamkwamba, a boy from Malawi who saved his family from famine by teaching himself how to build a windmill. Mr Ejiofor tells Anne McElvoy why, despite recent progress, there is still so little diversity behind the camera. They discuss what it will take for Hollywood to start casting black actors as the romantic lead and how much power directors have to change the status quo. Runtime: 22 min.