What do the price of hair-salon services in Beijing and sexual services in London have in common? The answer is that, depending on how you measure them – or indeed whether you measure them at all – the size of the Chinese and British economies will

Source: www.ft.com

"Gross domestic product has become a ubiquitous term. It is how we measure economic success. Countries are judged by how much they have of it. Governments can rise and fall according to how effectively their economies create it. Everything from debt levels to the contribution of manufacturing is measured against it. GDP is what makes the world go round. Yet what exactly does it mean?"