Wood Mackenzie s global GDP growth forecast for 2014 and 2015 is unchanged; we continue to expect the world to grow by about 2.7% this year and 2.9% next year. However the short term drivers of growth have changed over the past year. After a poor start to 2014 emerging economies are weaker than previously forecast. Our view on Europe is improved however and this offsets the weaker outlook for developing economies. The largest contributors to global output the US and China are unchanged.