2nd-Tier PPC Search Engines Offer Greater ROI - 7Search White Paper
BtoBOnline.com
recently published a white paper titled, "Complimenting Your Marketing Buy with an Online Campaign Using a Second-Tier Pay-Per-Click Search Engine" developed by 7Search.com.
The white paper gives an overview of Internet Advertising and how the PPC format continues to lead the way. The highlights of the paper include a Search Network comparison of ROI as well as an in-depth look at how affiliate sites generate PPC traffic.
View White Paper
Here (pdf).