Who knows the Answer?

[William Keenan]

Unit Bribe
(37.25 / Distance + 2) * (1 + Treasury / 750) * Shields = Cost to Bribe

Distance refers to the distance from the capital. Normally barbarians have no capital so Distance is equal to 16. However, if the bribing civ operates under a communist government the Distance reduced to 10.
Treasury is the amount of gold in the Treasury.
Shields is the number of shields required to build the unit.

Double the Cost to Bribe if the unit is a settler type (role=5).

Immunity to Bribery is granted to any civilization, including the Barbarians, that operate under a Democratic government.



City Bribe


Cost to Incite Revolt = City Size * Wealth of Civ * Proximity to Capital


City Size = from 0 to 35.
Wealth of Civ = 1 + Treasury/1000. The revolting civ's treasury.
Proximity to Capital = 1000/(Distance+3). Where distance is the number of squares between dip/spy and the capital of the revolting civ. Distance is never greater then 16 and subject to several distance modifiers.
The Courthouse improvement halves the Distance (rounded down).
When the bribing civilization operates under Communism the maximum Distance is reduced to ten.


The Cost to Incite Revolt is adjusted by the following cumulative modifiers.

A Spy incites revolts at 5/6 the price of a diplomat.
A Veteran Spy incites revolts at 2/3 the price of a diplomat.
Disorder in the revolting city reduces the price by 1/2.
No Units in the revolting city also reduces the price by 1/2.
The Previous Owner of a city can incite a revolt at 1/2 price.
Operating under Democracy grants civilization immunity to bribery.
Palace improvement makes the city unbribable.

[techumseh]

I'm pretty sure that city cost is affected by the technology gap between briber and bribee. If a civ is more advanced, it's cities are quite a bit more expensive.

[Elok]

Well, cost of the unit, for one thing. In a lot of scenarios, unique units are given a cost of 99 so they can't be bribed without spending your entire treasury.

[kobayashi]

Seems the forum search function is disabled. Looks like I have to seek the aid of the collective wisdom here regarding bribing.

Besides distance from capital, do any other factors affect unit bribing? How about City bribing (Besides Courthouse and presence of spy/diplomat) ?

Veteran - seems no.
Defense Bonus
Fortified status
Type of government (other than democracy)

How about how bribing costs are calculated? WHat are the factors?

Gold
Cost of Improvements in a city
Cost of Improvements in all cities
Cost of units in a city
Cost of units in all cities

Would also be nice to know under what circumstances the AI likes to bribe?

p.s.
If the AI has the choice either to irrigate of build mines, does it alway irrigate. Do the goverment thresholds have any influence?

p.p.s
I sorta noticed that the AI doesn't attack units for which the odds of winning are bad. Does anyone know (roughly) the algorithm for determinng if the AI will attack.