I found this in the "Tips and Tricks for New Players"
10. "KEY" CIV
There is a mechanism in the game called the KeyCiv that tries to adjust a player's beaker costs as the gap in techs between players grows larger. A brilliant player called Samson discovered that your KeyCiv is based on cross-referencing your PowerRating with the colors of the Player List.
Here are the two lists:
#1/White=Pathetic
#2/Green=Weak
#3/Blue(dark)=Inadequate
#4/Yellow=Moderate
#5/Cyan(light blue)=Strong
#6/Orange=Mighty
#7/Purple=Supreme
So if your PowerRating is Mighty (see top line of F3), your KeyCiv is whatever player is Orange. If that is not you, your beaker "cost" for the current research will be adjusted by a factor based on the difference in number of techs each of you has acquired since the beginning (starting techs don't count). If you have less than your KeyCiv your beaker cost will be lowered somewhat. If you have more, it will increase. Each "jump" in cost happens for every three techs difference, so you don't have to worry every time you get a tech, just every three.
