Kerre Woodham: What is our obsession with shiny new stadia?

What is this mania for the building of stadia when this country has so many already and very, very few of them are economic assets? The decision over whether to upgrade Eden Park in Auckland or to build a brand spanking new stadium on the waterfront is such an old debate. And before I go on, I will say I've been a guest of Eden Park, but it does take more to buy my opinion than a very nice lamb chop and a glass of non-alcoholic rosé, I promise you.