Well, we all knows that last launched games includes usually special rule for vassals, because it produces a lot of MP at low centralization.
Well, at russian forum some guys made more researchment, and it was finally understood, that only first vassal gives real advantage.
1st vassal: -2% tech cost (probably stab as well), around +40% MP on Cent=3 (so i think depending on Cent you can receive from 0 to 50%)
2nd vassal: (tested on 1419 countries with less than 50 max MP). NO decreasing of tech cost (probably stab as well), +1 recruit (so +2 max MP).
following vassals: same as 2nd vassal. More than 5 were not tested.
Well, at russian forum some guys made more researchment, and it was finally understood, that only first vassal gives real advantage.
1st vassal: -2% tech cost (probably stab as well), around +40% MP on Cent=3 (so i think depending on Cent you can receive from 0 to 50%)
2nd vassal: (tested on 1419 countries with less than 50 max MP). NO decreasing of tech cost (probably stab as well), +1 recruit (so +2 max MP).
following vassals: same as 2nd vassal. More than 5 were not tested.