Didn't this study basically a "control" out of its ass?
That's how synthetic controls work. It's a pretty common and recognized method for studying discrete policy changes. The methodology is pretty solid.
But is there a Seattle in Seattle? They couldn't have done San Fransico?
Anyways, it would be interesting to see how this automates low wage industries and how that effects employment in technology and how it effects undercapitalized entrapanuers. Would productivity go up if undercapitalized business owners became employees that had similar compensation?