No city in America runs on anything resembling a free-market model. But Texas’ major cities are probably the closest thing, with vast improvements to their economies and living standards to show for it. Their looser land-use laws mean that housing supply grows quickly, stabilizing prices. Their lighter tax and regulatory structure helps businesses locate there and grow. And—shenanigans from the governor’s office notwithstanding—their openness to immigrants means they have cheap and robust labor forces.