I think there is a bug in the research bonus. From level 12 to 13 it actually drops from +180% to +90%, rather than doing the expected +190%. This -100% drop looks like it carries over into the higher levels too.
Thanks for bringing this up, I fixed it already. There was indeed a bug, but sadly the other way around. It was intended to continue to increase by 10 percent for level 11 and 12 as well. Sorry for the inconvenience!
If anyone wants to test their clicks per second or know the best ore to mine for their stats I made a calculator to help: www.kongregate.com/games/steelgiant/idle-mine-calculator
Give it a try!
If anyone wants to know the best ore to mine for their stats I made a calculator to help: www.kongregate.com/games/steelgiant/idle-mine-calculator also allows you to test your clicks per second!
@emperor_orionii the gold per second calculation already does that. Try my calculator if you want more details though: www.kongregate.com/games/steelgiant/idle-mine-calculator
Just updated my calculator for this game:
http://www.kongregate.com/games/SteelGiant/idle-mine-calculator
Let me know if there are any features you want added!
One more update to the calculator: you can now test your clicks per second:
"Idle Mine Calculator":http://www.kongregate.com/games/SteelGiant/idle-mine-calculator
It also has clicks per second leaderboards! :P
I've made an update to my calculator: it now works in terms of $/second and uses both manual and auto clicks:
"Idle Mine Calculator":http://www.kongregate.com/games/SteelGiant/idle-mine-calculator
I've made a calculator for this game so you can see which ore is going to get you the best $$$ per click: http://www.kongregate.com/games/SteelGiant/idle-mine-calculator
 "Crafting Idle Clicker"){kind=icon}
 "Idle Mine"){kind=icon}
 "Frantic Sky"){kind=icon}
Thanks for bringing this up, I fixed it already. There was indeed a bug, but sadly the other way around. It was intended to continue to increase by 10 percent for level 11 and 12 as well. Sorry for the inconvenience!