More about "The Economy of Cities"

Okay, in comments there was a question:

So is this book written from the perspective of "I know how to best plan cities"? Without any data, how can the author make a claim that mixed zoning is physically inefficient?

To the first part: no. The author basically claims in this book that the "city planning" we mostly know and loathe is worse than useless, and development should mostly be allowed to occur spontaneously.

To the second: there isn't any data presented, so she can't, if you ask me.