...for-dollar, print still delivers a strong proposition, offering a lower cost per call than leads captured via onlinemethods. Clearly as search continues to fragment, it’s reassuring to see major advertisers and small businesses alike...
http://searchengineland.com/our-relationship-to-the-bottom-line-14842
...the search industry to test and retest which traffic sources are in fact generating telephone calls as opposed to other onlinemethods of contacting a business such as email, ecommerce transactions and online forms. By using this tool, we have...
http://www.freshegg.com/pdf/CallTrackID_White_Paper_Fresh_Egg.pdf