Bertaud knows cities inside out. It is a pleasure to read something by a person who knows his subject in so much depth. He reveals how planning can mess up cities, how the market is more intelligent than planners, etc.
Aside from the potent Hayekian argument, Bertaud gave me some intuition for future real estate investments: a city is a labor market since people change jobs and companies add and subtract employees. Any form of planning needs to accommodate such a fact. And if cities are principally labor markets, they should both concentrate and differentiate along with globalization.