Evidence is a lovely thing sometimes. Like the speck of blood on a bomber jacket that has finally convicted the racist killers in London, 19 years after the crime was committed. In a different way, economic data is continually flowing in that makes vocal elements in my profession look like idiots. The only question is how long will it take for the rest of the world to know that and for governments to stop being influenced by the opinions of these economists. Over the last few decades I have been compiling interviews and commentaries from leading economists so that I can compare their predictions with the evolving reality. Economists typically make categorical statements such as – rising budget deficits will push up interest rates and choke off private spending – and then buttress those comments with arcane models that were negated both conceptually and empirically years ago. Invariably, when the mainstream economists do make predictions or empirical statements they are invariably wrong and then it is interesting to see how they respond to the anomaly – the dance that follows to try to maintain the upper-hand in the debate. They typically respond by nuancing the issue. But there are also times when their predictions are unambiguously wrong and ad hoc responses (of the Lakatosian type) make them look even more stupid. Then they bury their head in the sand and go into denial mode and their ideology takes over. The best antidote to this sort of dogma is evidence.