30 + 50 * (Number of Territories in THIS City) * (Number of Territories in ALL Cities)
Civic Enactment Cost:
20 + 5 * Era^2 * Enacted Civics^2
All of these grow quadratically. The Civic enactment cost in particular jumps up massively in each era and gets prohibitively expensive so if you do plan to enact a civic it is much better to do it just before changing into the next era.
Also interestingly the reductions for enabling/cancelling Civics are ADDITIVE, not multiplicative (unlike say unit construction costs) so if you have Writing (-20%), Encyclopedia (-20%), Press Freedom (-20%) and the Tenet Undertake Pilgrimage (-25%), the cost of enacting/cancelling civics becomes a mere 15% of the raw numbers.
Wait, so if all those other modifiers for civic cost drops it to 15%, what happens when one also adopts the Ming culture on top of all that? Doesn't that culture's LT also reduce civic costs by 25%?
Wait, so if all those other modifiers for civic cost drops it to 15%, what happens when one also adopts the Ming culture on top of all that? Doesn't that culture's LT also reduce civic costs by 25%?
I just checked - yes!!!!
You can have infinite influence at this point by enacting/cancelling civics repeatedly - SpiffingBrit, this is one for you! :)
As of the latest patch this formula is no longer true. I haven't fully worked out the new equation yet but there definitely is a cubic component to it now. However just doing a naive fit gives me some really odd coefficients (1.407, -1.79, 3.217) so there probably is something else here that I am missing.
On the flipside it looks like the progression with Era is less severe now and it appears to be linear.
So my best theory right now is that it is
20 + Era * Cubic Polynomial in terms of "Enacted Civs"
Right, so after some intensive test I think I found the new equation. It is not an exact cubic as I had assumed but a power of 3.1 (not sure why they didn't just go for the clearer power of 3 ... other than to confuse me!).
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