That allowed us to consider cities like San Francisco and Oakland, Calif., separately — places that have independent housing trends but are lumped into the same larger metropolitan area.

这样一来，像加利福尼亚州的旧金山和奥克兰市等城市，也能单独地进入我们的视野——这些地方，虽然它们的楼市价格的走势具有相对独立性，但我们还是把它们汇总到同一个大都会里。