Mind perks

[Twotribes]

I assume the different perks for advancing a type like Mind or democracy or such are not cumulative but rather a set amount that goes up with mind there are 3 research bonus and 3 culture bonus going from 30 to 50 percent.

[Soar_Slitherine]

According to combat reports the Fist combat power bonuses are cumulative, so I've been assuming that the other bonuses are as well.

[zgrssd]

The game outside of combat bonuses generally uses "Bonus Points", rather then percentile bonuses.
So I am not even sure how this "+50% Reserach" is realized in the first place [&:]