The US economy fell for the fourth year to 7th most competitive global economy, followed by Britain at 8th.
Some 30 of the countries measured in the index are assessed to be "more innovation-driven", and were an area of weakness for New Zealand, which ranked 27th.
"Insufficient capacity to innovate" emerged as the third most significant "top problem" identified by New Zealand executives surveyed. Ahead of this were inadequate infrastructure and an inefficient bureaucracy.
On the fundamentals of honest government and transparent processes, New Zealand rose from third place globally to second, and new sustainability measures in the index ranked New Zealand above Australia and improving.
"WEF's main overall finding is that there is no necessary trade-off between being competitive and being sustainable, based on its definitions," the NZ Initiative says in a presentation on the findings of the 500 page report for New Zealand.
"Many countries at the top of the competitiveness rankings are also the best performers in many areas of sustainability."
The index makes no judgments about relative exchange rates as an influence on competitiveness.