It's in a few papers, however I don't put much credence in think tanks they often get things very wrong. http://www.telegraph.co.uk/finance/economics/6750844/Britain-risks-falling-out-of-worlds-top-10-economies.html As you have already mentioned Alonzo the current high strength of the Euro and exchange rates has affected Britain's position in relation to some European countries, whilst Canada and Australia are much bigger countries with far greater natural resources. However it's not that Britain is going to decline, it's a case of other countries such as the BRIC Nations are growing rapidly and some countries have vast natural resources such as Russia, Canada and Australia.