For me a city…is a complex but incomplete system. And in that mixity of complexity and incompleteness lies the capacity of cities to have very long lives. Much longer lives than very powerful corporations, which often are very closed systems.
I think one first step is to distinguish between traditional banking, which sells money it has (or it can borrow very quickly, whatever) and finance, which sells something it does not have. And in that selling what it does not have lies its creativity. It has to invent instruments. And secondly—and they go together—it has to invade other sectors. Because it itself does not have what it needs to produce.
We know very little about complex financial systems and how systemic risk, as it’s called, is computed and how you would manage policies. And if you look back at the financial crisis, you can either say, as many economists do, “It all had to do with badly-designed rules,” which may be part of the story; it’s certainly part of the story. Or it may have to do with the interaction of those rules and human nature, like mortgage broker greed, optimism… And you see it not just in individuals who now have houses and foreclosure, but at the highest levels.