Trump's election will double America's growth because his tax cuts and spending boost will stimulate the economy, experts predict.

The US economy will grow by 2.3 per cent in 2017 and 3.0 per cent in 2018, said the Organisation for Economic Cooperation and Development.

That compares to estimated gross domestic product growth of 1.5 per cent this year.

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Booming: The US economy will grow by 2.3 per cent in 2017 and 3.0 per cent in 2018, said the Organisation for Economic Cooperation and Development

The Republican property tycoon's team has said he will devote $550billion to rebuilding decrepit infrastructure.

The incoming president also campaigned on promises for major corporate tax cuts as part of a wide-ranging blueprint for the limping US economy.

His infrastructure projects are forecast to combat inequality and energise discouraged workers.

'GDP is projected to return to a moderate growth trajectory in 2017 and strengthen in 2018, mainly due to the projected fiscal stimulus, which takes effect particularly in 2018,' the OECD said in its report.

'Indeed, projected fiscal support will boost GDP growth by just under 0.5 and 1 percentage point in 2017 and 2018 respectively,' the respected think-tank added.

Global growth would also benefit if the US president-elect's avowed spending and tax plans boost domestic investment and consumption, the Paris-based body said.

It now sees world GDP growth rising to 3.3 per cent next year and 3.6 per cent in 2018 but stuck to its 2016 forecast of 2.9 per cent.

The US economy will grow by 2.3 percent in 2017 and 3.0 percent in 2018, said the Organisation for Economic Cooperation and Development

However, Trump's plans have been treated more sceptically by some economists who do not anticipate such a rosy outcome.

Ryan Bourne at the Institute of Economic Affairs notes that the success of Trump's infrastructure spending could depend on what he chooses to build.

'Rather than investing in things with high economic returns, political choices often mean investment in favoured regions, or on projects with lower economic returns but higher political rewards,' he wrote.

'Devoid of market pressures, state infrastructure projects are often beset by cost overruns.'

He notes that Japan spent $6.3trillion of public money on big projects and ended up with 'bridges to nowhere' while Spain was left with empty airports.

Moreover, infrastructure projects financed by borrowing will increased the national debt which already stands at $19.2trillion.