These are the results of the Grant Thornton Global Dynamism Index (GDI) 2013, an annual research project designed by the Economist Intelligence Unit, which ranks the development of the business growth environments of 60 of the world's largest economies over the past 12 months. The index draws together 22 indicators, including GDP growth, R&D spend, regulatory risk, access to finance and labour productivity, across five areas of dynamism to produce the rankings.