Just like to say - I don't think this is a good idea. Ambiguity is the RPer's friend when it comes to economics. This is not an economic modeling RP and I don't want to be bathed in a sea of number crunching (happens enough with ships already).
It's just staggeringly complex and arbitrary to implement, and we could have a whole management team working full time who I am sure could not do it justice. As for affording things, I tend to just suggest staying within the bounds of reason (I don't like tossing around numbers over the low billions maximum with a Core World or millions with rimward worlds).
Also it's difficult because it would give the core worlds a massive advantage. Take Alsakan or Imperial Center, they must logically have (as a result of a population around 1 trillion) multi-thousand trillion credit economies.. just to complicated to work out. As a rule though it's best left to discretion with management intervention if it gets silly.Added (15 Jan 2012, 2:25 PM)
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Sorry for commenting, thought this was on the OOC board for some reason.