In theory cities planning their own growth sounds good. In practice it fails miserably. I think it should really be decided at the metro area level. Since job

In theory cities planning their own growth sounds good. In practice it fails miserably. I think it should really be decided at the metro area level. Since job markets exist at that level, having housing decisions there avoids the problem where a city benefits from a booming economy but refuses to provide housing to anyone participating in that economy, shoving that responsibility onto the other nearby cities.