Average $ per click (per day) identical for 3 weeks

Does anyone track this?

[claus]

Is anyone monitoring their average earnings per click ("EPC") in AdSense? (1)

For the past three weeks my average EPC for one site has been identical every day. Not just "on the same level", but identical to the last decimal place - even though clicks, impressions and everything else has been different from day to day.

In all my years of using AdSense EPC-figures have never been identical for two days in a row.

Does anyone have an idea about what might be causing this?

--
(1) It's not a figure that the Google web page calculates for you, you have to take your earning per day and divide it with the number of clicks manually.

[JS_Harris]

Since everything else has been different every day chalk it up to luck or lack of significant traffic.

[claus]

Well, it's not lack of significant traffic as everything has been on the "up and up" in that period. And it's not luck either, as that EPC isn't exactly high. But then it may just be random (like hitting 21 heads in a row with a coin...)

[ken_b]

For the past three weeks my average EPC for one site has been identical every day.

I've seen "close" a lot, but three weeks of "identical" seems really strange. I don't what that could be though, unless two advertisers are fighting for space on your site, and I don't know if that would do it.

[claus]

Uh-oh... it was an "Error 40", ie. the error was 40 centimeters from the screen. I messed up the calculation, copied values in stead of formulas. Stupid me...