Land is zero sum (which is why a Land Value Tax is such a good idea), but housing, which is what people actually consume is not. We have the technology to build more housing, just not the regulatory regime, which is what this article is about.
That is the most significant comment here. People keep going on about land when the real problem is housing. US housing density is awfully low. Our country's major population expansion took place after the car and our model of building cities went horizontal rather than vertical.
