New Zealand has climbed five places to 18th in the World Economic Forum rankings while Australia has slipped one place out of the top 20.
"It shows what better we could do as a nation, and how much more wealth we could generate, and how much of a better life we could get. It only matters if you want a better life."
Former US Treasury Secretary Larry Summers says the dollar will remain supreme but others see the renminbi going global sooner rather than later.
The global economy will grow 3.5% this year, IMF managing director Christine Lagarde tells the Davos summit.
Trade minister will be discussing his candidacy for the organisation's director-general.
Auckland-based biofuels pioneer tipped by the influential forum as "an industry-changing company with the potential to transform the future".
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