I can think of a couple of potential reasons. Higher costs due to tax rates and/or cost to comply with New Zealand regulations spread over a relatively small s

I can think of a couple of potential reasons. Higher costs due to tax rates and/or cost to comply with New Zealand regulations spread over a relatively small subscriber base. Small New Zealand subscriber base and New Zealand not being a main target market for The Economist means New Zealand subscribers do not generate as much additional advertising income as those in the US. This is offset by increased subscription rates.