Information--regular, systematic, reliable--is the life-blood of democracy and the fuel of effective management. Surely today there is no problem with information, for this is the age of information overload. It pours onto our computer screens and out of our printers. Indeed, many governments claim, often with some justification, to be more open and transparent than ever before. But what if the life-blood is contaminated, or the fuel polluted? Then the body politic sickens and the engine of public management runs rough. It is the vital issue of the quality of the information we...