Previously Robert was US editor, business editor, Washington correspondent and Lexington columnist covering American news and politics. Prior to this, he covered Africa for seven years, based in London and Johannesburg. Before joining The Economist, Mr. Guest was the Tokyo correspondent for the Daily Telegraph, and before that he was a freelance writer based in South Korea. He is the author of “The Shackled Continent”, a book that tries to explain how Africa can prosper, and “Borderless Economics: Chinese Sea Turtles, Indian Fridges and the New Fruits of Global Capitalism”, which argues that migration makes the world brainier.