How would a Korean war impact the global and NZ economy?

Reuters reports:

A majority of Americans support military action against North Korea if economic and diplomatic efforts fail, according to a Gallup poll released on Friday amid rising tension over Pyongyang’s nuclear weapons program and recent missile launches.

The survey of 1,022 U.S. adults last week found that 58 percent said they would favor military action against North Korea if the United States cannot accomplish its goals by more peaceful means first.

If a conflict does eventuate between Japan, the US, South Korea and North Korea, it is likely to send the global economy into a recession. I suspect the NZ economy would follow. All those parties’ spending plans based on surpluses may find the world has changed.