In China, impact of earlier policy stimulus on activity proved more powerful than expected, slowdown in housing market has taken longer than expected
U.S. growth forecast for 2017 has been revised down slightly but this has been offset by a better outlook for China and Japan
Weaker q1 US growth was explained by consumption and looks to have been affected by temporary factors
Expects world growth to rise to 2.9% in 2017 from 2.5% in 2016 and has slightly revised up its 2018 forecast to 3.1% from 3.0% in march