What's the Overture's CTR?

Does it affect the position?

[Aimee]

I know the CPC and CTR would affect the keyword's position on google AdWord, but I don't know if the CTR would also affect overture's listing?
If not,what its worth?

[Brett_Tabke]

It is simply how much you bid...

[hobbnet]

If your CTR is too low though relative to your competitor's CTR your keyword may be removed due to a "Low Click Index"