Cities are the chief motors of economies. You can't talk about economies without talking, at least obliquely, about cities.
Any human settlement is an economic equivalent to a local ecosystem.
Just as ecology is the economy of nature. Presumably that steps you right up to the question of global economy. The nature of economies comes to that. But people want these prescriptions. You can't prescribe for a global economy any more than you can get a handle on prescribing for a global ecosystem.