The information on Planetary Improvements tech says that research is +10. However the only
difference I noticed after getting the tech is that the cost of techs went up alittle less than 10%, saw no difference
in how many TPs I got.
Specifically Advanced Computing cost 64 RP before I got Planetary Improvements and 69 RP after.( didn't
actually research Advanced Computing just keeping track of its cost in RPs )
Got these numbers by temporarily setting my research down to where i only got 1 research and then seeing how
many turns it'ld take to get techs.
Playing on the easiest setting with a 5x5 map with 1 opponent so i could do research on these types of game mechanics
to formulate some stragegies -- thwarted again by faulty game mechanics --- just kidding this is really not all that
important but would be nice to have basic game mechanics working correctly.
Just jumped out mid post and tried creating a custom race with +10% research -- it had no effect -- no bonus or
negative -- but think i read that in other posts too. Maybe this is tied to that somehow -- they planned to give you
+10% research but counter it with +8-9% research costs, lol.

BTW it would be nice if you could give us the exact costs of techs in RPs in game( in tech tree, even if just a popup with
mouseover)