For years the four mighty BRIC nations have grabbed increasing shares of world investment flows. But the coming years may not be so kind.  These countries bring up the bottom of the Economic Freedom Index (EFI) for 2012. Compiled by Washington D.C.-based think-tank The Heritage Foundation the EFI measures 10 freedoms —  from property rights to entrepreneurship – and according to a note out today from RBS economists, there is a strong positive link between a country’s EFI score and the amount of FDI (foreign direct investment) it can secure. So the more “free” a country, the more FDI inflows it can expect to receive — that’s what an RBS analysis of 2002-2008 investment flows shows.