Which areas of New Zealand are growing and which are shrinking?

That long-running battle between Wellington and Christchurch for the title of our second-largest city . . . Well, that looks pretty much settled now, with the Garden City pulling ahead, while Wellington's population has fallen back to 2017 levels. And it's not just Christchurch that's growing . . . New Stats NZ data shows the majority of the country's urban areas are on the up, with the capital and Dunedin among the few exceptions. So what's driving these changes? And what might the map look like in the years ahead? Joining me now is Infometrics principal economist Nick Brunsdon.