1) Refined Economics doesn't work for Kingdom factions.

Similar Refined Bartering for Empire works.

To fix: Refined Economics should use A_Gold, instead of A_Wealth as game modifier.


2) Refined Learning doesn't work for Empire faction.

But Refined Education for Kingdom works.

To fix: Refined Learning has its game modifier completely missing. Copy the similar one from Refined Education.


3) Refined Housing appears to work (if you check housing details, you'll see the bonus), but it doesn't increases population cap. City with limit of 250 people due to housing will still have that limit after this tech is researched.


4) Refined Diplomacy doesn't do anything (diplomatic capital production isn't increased).

Any more? Feel free to add.