http://www.onlinetvproduct.com/as-seen-on-tv-online-work/
How Yelp Crushed Citysearch & Yahoo Local … & Why Google Is Stealing Yelp’s Playbook
A fascinating study published last year compares the reviews and reviewers at three local business websites: Yelp, Citysearch and Yahoo Local. And, in explaining how Yelp overtook the other two, it also hints — in my opinion — at how Google is trying to beat Yelp by using Yelp’s own playbook.
Large Hadron Rap