Chris, I hope I'm not being too anal[ytical] about this, but I think that r is r(t), and that we don't necessarily know the form of n(t) or r(t). Looking at your number of posts, I'm guessing that you are a seasoned player, so I trust your judgement. But, if we wanted to be semi-empirical about it, we could collect data (possibly with the --statfile option, though I haven't tried it) on number of provinces and dominion for each turn, and then fit the data sets as a function of t. This would give the forms for n(t) and r(t).
Of course, this might just tell the experimenter that he needs to improve his n(t) - build more temples.
