Ed Balls's department has not, at the time of writing, seen fit to publish this report despite regularly promising to do so.

Modern life is bedevilled with predictions and projections that turn out wrong. Charged with the fact that the Earth's average temperature has not actually increased since 1998, a Met Office scientist recently said: "In many ways we know more about what will happen in the 2050s than next year" — a remark to chill the blood. Who forecast the global financial collapse? Nobody. Yet many experts did forecast, wrongly, that the world would starve just as the Green Revolution kicked in and generated 30 years of plenty. 

Wait long enough and most of today's most confident predictions will turn out wrong. We only continue to believe in them because we remember the few that came true, and forget the hundreds that didn't. Maybe it's no coincidence that extrapolate rhymes with evaporate.