As the story goes, von Neumann solved the problem instantly by computing the sum of a geometric series, which is the hard way. Harford ends by writing: “I almost hope the story is true”, as it ...

From Jonathan Haskel, Professor of Economics, Department of Economics & Public Policy, Imperial College Business School, London SW7, UK ...

Regarding the report that WHSmith will disappear from the high street (March 29), I recently visited my local Smith’s. Inside the store was a rack full of daily newspapers but the FT’s section was ...