Science Cost and Cities

[AverageDude]

I know that the science cost of new techs increases with the number of cities you have, but have heard some different numbers for the amount of the increase.

Is it 2% or 5%? And how does it change with map size/difficulty?

Also, is the increase simple or compound? i.e.- does the science increase from the third city increase 5% of the original cost of the tech or 5% of the cost of the tech after founding your second city?

 

[Insane Chef]

I believe its 2% for huge and 5% for standard? you can always know for sure if you mouseover your science number ingame, same for culture

 

[joncnunn]

Science & cultural city penalties are based on world map.

In case of science, 5% on standard and smaller. Somewhat less on large. Lowest percent on huge. Mouse over in game; my computer slows to crawl on huge maps.

 

[Browd]

5% on standard maps and smaller, 3.75% on Large maps and 2.5% on Huge maps.

See C:\Program Files (x86)\Steam\SteamApps\common\Sid Meier's Civilization V\Assets\DLC\Expansion2\Gameplay\XML\GameInfo\CIV5Worlds.xml and find the lines labeled <NumCitiesTechCostMod>