Is it Europe, USA or Asia that creates more earnings?

[elfred]

My daily earnings are quite linear through the whole day, but they drop starting around 16:00 GT (Google Time :-)). By that time, it is 01:00 AM here in Europe so I guess Europe is no longer "feeding" earnings.
Before attempting some kind of hourly adjusted geo analysis of web logs, I would like to know what you think about how much would Asia, Europe and USA bring to any english web site that is worth reading all over the world.
My first attempt seems to say that Europe has a big relevance.
By the way: I'm trying to figure out if page views in specific countries or regions could perform better using anything different from AdSense.

[Sobriquet]

USA

[OddDog]

hi i am also based in europe.

the local wisdom is that usa pages best ecpm. if my memory does not fail me this was confirmed by google itself (i cannot confirm this - but i have that idea in my head)

i also see drastic fails in my ecpm from evening european time through to the morning again.

[elfred]

Thank you for your answers. What I'm thinking about is: since advertisers can choose not to pay more than a certain amount per day, we might see a drop in EPC which is not due to regions, but to the time of the day.
I would like to compare this assumption of mine with your experience about intraday earnings.