Many buildings in Civ 5 provide a percent-based gold production boost (eg. Market, Bank - +25% gold output).
The question: how is the bonus calculated?
Possible options:
- Once, when the building is finished. This way, a city with gold output of 20 gets additional 5 gold per turn bonus that stays equal to 5 til the end of the game.
- The bonus is recalculated as the game progresses, and cumulates additively. This way, the city always gets the bonus of 25%. If another building is created with the same 25% boost, the total boost is equal to 50%.
- The bonus is recalculated as the game progresses, and cumulates multiplicatively. If another building is created with the same 25% boost, the total boost is equal to (1.25 * 1.25 = 1.5625, so 56.25% total boost).
Thank you for your time.