"Network paid clicks, which include clicks related to ads served on non-Google properties participating in our AdSense for Search, AdSense for Content, and AdMob businesses, decreased approximately 11% over the fourth quarter of 2013 and decreased approximately 7% over the third quarter of 2014"[1]
"Average cost-per-click, which includes clicks related to ads served on Google sites and the sites of our Network members, decreased approximately 3% over the fourth quarter of 2013 and decreased approximately 3% over the third quarter of 2014."[1]
"Google's Ad-Price Declines Continue for 12th Straight Quarter"[2]
> There isn't a single cite in this entire thread to back that claim up outside of the anecdotal examples.
ChuckMcM cited Google's earnings report in a top-level comment[3] nine hours before you claimed there isn't a single cite.
[1] http://investor.google.com/earnings/2014/Q4_google_earnings....
[2] http://adage.com/article/digital/google-s-ad-rate-declines-c...