Quote Originally Posted by Tamur
Also re: trade distance, there must be something to this.
A bit more data, this time from Kydonia:

Code:
Pop	Import	Town	DisCity	DisPort
16379	469	Sardis	25	15.5
18595	489	Perga	30	20
DisCity is the city-city straightline distance.
DisPort is the straightline distance from the rally point of each port.

Only thing I would say is that it may go on the length of trade route itself, which is much, much harder to quantify.