Ah, thanks a lot for this. My first playthrough was rather "tight" as I didn't play to the mods economic dynamics, but now I will.
Also appreciate the document as a quick primer on the Eurasian trade dynamics of the age.
ADDIT: bit of a side question on tin . . . I was told by an Med archaeologist colleague that the actual reasons for the "Iron Age" were not really what was widely believe, i.e., that iron was "better" as a material or that the craft of forging it was only "discovered" that late. Rather it seems to have something to do with the scarcity of tin (needed in bronze manufacturing?) and the toxic fumes produced by iron smelting? My memory is a bit garbled but I want to say that: the materials for iron were abundant but the process to make it was unhealthy, and the material was not much better than bronze. Bronze (or copper alloys more broadly) required materials which were more scarce, but was a good material and the forging technique(s) were not so unhealthy?
I dunno, this guy was a largely unpublished Ph.D. who never got tenure, so maybe his opinions were bogus? Anyone know?