Estimate the CTR increase for bid increase

Does anybody know how to estimate (not using google's bid simulator) the increase of the CTR for every riase in my search bid?

I am actually looking for formula or an algorythm that can predict the ammount of more clicks I will get if I raise my bid from x to 1.2x / 1.3x / 1.5x ...

Any ideas?


Thanks

Tal

 

Not really a formula but a table of my clients' relative CTR by position during 2009.

Position Relative CTR
1 100
2 88.5
3 56.4
4 48.5
5 47.5
6 53.5
7 59.8
8 58.1
9 53.8
10 43.7

So if your ad averages 5th position and has a 2% CTR, you can expect only a slight increase in 4th position. Note that this is based on ads clients created. The type of ad you write will affect these numbers. Ads I created myself for the same clients show a different picture:

1 100
2 95.9
3 92.9
4 77.7
5 69.1
6 70.1
7 69.7
8 69.7
9 64.0
10 62.7

 

Hi man

1st, thanks!!!

just to make sure, according to the second table, if I am now on 2% on average position 6, and plan to raise bid to reach 3rd position, I can expect about 2.65% of CTR? (2*92.9/70.1)


Tal

 

That's right. This is an average however. You could have totally different numbers such as one client getting 14% of the click rate in 10th compared to 1st.

It doesn't tell you what you have to bid or what you will pay, which is what your question really was. There is no direct correlation (ie, raising bid 10% doesn't raise CTR by 10%). Costs are dependent on your QS, bid and those of competitors.

 

yeah... the more I thought about it the more I got to what you said...

Thanks anyway, your figures do help a little...