Been a few years since I last posted, but well, FreeTrav, you asked for this. How does having multiple economically-interesting worlds in a system affect system trade stats? As I'm a GT guy by preference (with a couple of TNE books kicking around in storage), I'll frame this in GT terms. I'm saying economically-interesting worlds have a WTN of at most a half point below the biggest in-system WTN. Frinstance, IMTU, the Iderati system has undergone somewhat more development than in canon, sporting two hi-pop hi-tech worlds Iderati III: Pop 20 billion, GTL13, Subsector capital, Industrialised, Class V port - UWTN is 6.5, unmodified by port to give WTN 6.5. Per capita GWP is Cr34,160/a, GWP is TCr680/a Iderati V: Pop 2 billion, GTL12, Rich, Agricultural, Class V port (bent somewhat from GT:FT guidelines for sake of argument) - UWTN 6.0, unmodified by port to give WTN 6.0. Per capita GWP is Cr28,800/a, GWP is TCr57/a In this situation it doesn't affect WTN, but would easy access to a GTL13 world drag Iderati V up to GTL13? (Yes, I was going for "technoeconomic juggernaut" feel). Trade codes would obviously be: iderati III: Cp In Iderati V: Ri Ag If Iderati Vs population was under a billion, or its GTL was 11 or lower, its WTN would drop to 5.5 and thus below my "economically-interesting" cutoff. Since it doesn't, is such a system's trade codes the union of its interesting worlds' codes? Ie, for external purposes (and to save me having to take a crowbar to PyRoute's guts): Iderati system: WTN 6.5 Trade codes Cp, In, Ri, Ag Similarly, would three economically-interesting worlds , each having the biggest WTN in-system, end up boosting overall system WTN by a half point, in addition to system trade codes being union of all three worlds?