Page Rank went down but incomes are going up

In one of my adsense site, my page rank went from 5 to 4, but my income is going up , what can be, i not been doing any optimization

 

You should be happy.
Pagerank is irrelavent to your Rankings.
although it acts as an indicator for good sites.

 

It would help if you have a little more information. What is the url? Has traffic increased? Did you add more links to your page? Did you change your ad layout? Just to name a few...

 

I'll pick more income than higher pagerank in a sec.

 

However, if adsense earnings drops dramitcally, he may have trouble recovering income by selling adspace / text links.

 

Hi,, i know is not relevant , but was obviusly since the page rank changed, i didnt change nothing actually not layout not ads position, my url is the business directory in my firm

 

How about your traffic? Has it increased?
Here are the alexa details I received:
Traffic Rank for empresas.co.crWhat's This?
Today 1 wk. Avg. 3 mos. Avg. 3 mos. Change
N/A* 163,391 222,265 up 101,417
* Daily values are not available for sites ranked outside of the Top 100K.



Reach for empresas.co.cr: What's This?

Reach per million users:

Today 1 wk. Avg. 3 mos. Avg. 3 mos. Change
10 8 5.8 up 63%



Page Views for empresas.co.cr: What's This?

Page Views per user:
Today 1 wk. Avg. 3 mos. Avg. 3 mos. Change
2.0 4.8 3.6 up 6%

Looks like page views and reach are up. However, I dont really trust alexa.... so take a look at your stats in your control panel.

 

yea its been increased but not so much, and about alexa, i dont trust either, most of my trafic are from Costa Rica and State and is coming 85% from google.co.cr ( costa rica)