Global growth appears to have peaked, with demographics, a lack of investment, a slowing in productivity gains and tightening monetary policy placing limits on economic expansion, the World Bank said.

The world’s economic output grew 3 per cent last year as more than half of economies accelerated, thanks to a rebound in investment, manufacturing activity and trade, bank economists said. The global economy is expected to maintain that rough growth level through 2020. 

But that may be as good as it gets, according to the bank’s annual report on the state of the global economy. The problem facing the world is that after years of recovery from the 2008 financial crisis, most advanced and developing economies have closed the output gap between actual and potential economic growth.