Some initial thoughts on economies.
A general thought is that the Distrikts Major are (rightly) partitioned across ideological/cultural lines, not economic ones. So, you can imagine economic models taking roots across various districts. For example, you could well have advanced cooperatives in the Covenant, the Assembly and Medium. This would mirror the real world pre-1989, where you had state-owned companies in the West, and private companies in the Socialist Bloc. The same models were used everywhere, but their relative frequencies would be different, giving each bloc its own flavor. Are we OK with it, or does it become too blurry to make for good narrative?
Fairly easy – some kind of turbo-capitalism, dystopian but allowing for some social mobility. The world of Numbercaste is a decent example. Chickenification, though that does not work so well when emigration is easy. It is easy imn this world?
From an economic point of view this seems to be very similar to Libria. I would even be tempted to suggest they merge, and the Greek-Roman vs. De Sadian-Friedmanian flavors be offloaded to Distrikts Minor.
I have done some work breaking down the Benedictine economy as we worked on the idea of the unMonastery (here and here). Very happy to do some fleshing out here, in fact it would be a good place for me to start. Benedictine monasteries are very efficient productive units, and they can form clusters that are protected by nontariff barriers to trade. Maybe the strongest economy here, if they do it right.
Good opportunity to flesh out the economies behind science fictional places like Anarres, or Red Plenty. We can imagine Distrikts Minor doing commons-based stuff, or new cooperativism.
The Assembly would be a good place to imagine an Ostromian economic policy: the governance effort is directed towards sustainability of renewable resources. A lot of the equilibria are low input-low (but almost free) output from those resources. Example: lithium is limited and polluting, so you would run your society with solar power generation and minimal power storage. The economy would speed up its metabolism when the sun is shining (production, investment), and slow it down when it is not (social activities, down time). Much like pre-industrial societies.
Bland socialism, suspicion of individualities… a sort of Sweden, but drab. Or of Belarus, but with better low-brow mass entertainment?
What do you think, @Joriam and @yudhanjaya? Anyway, this is a lot of fun already.