Originally Posted by Foot
A small tax bonus would be suitable, it is much easier to tax a populace if they all use the same formal currency. Also having your own mint was a sign of independence and was a sign of wealth and power, so a happiness bonus wouldn't go amiss either.
But let me get this straight, you would rather have a brothel (with rather bogus bonuses I might add) over a mint (an important build in the history of market economy).
As I said, they formalise your economy, act as PR for the ruler whose stamp (usually head) appears on the coin, among other things.
Foot