Does anyone know of any research that compares the the CTR of PPC & raditional online display advertising?
I’m looking for research which compares the effectiveness of PPC (paid search ads) to traditional online display ads (banners, buttons, etc..) All the stats I can find are on the amount spent on these different types of ads, but nothing on the relative effectiveness (probably as measured by CTR). I’m based in the UK so UK based research would be preferable, but anything from a reasonably mature internet culture would be a start.