• http://www.kevinlee.net/ Kevin Lee

    Difference between the SEMPO and IAB numbers are easily reconciled:
    Several things:
    1) IAB is advertising only, SEMPO is Search Advertising, + SEO + Tools and Technology + Keyword driven (Facebook, LinkedIn)
    2) Canada + Mexico

    Facebook alone adds a couple billion if you believe the WSJ. Then there’s LinkedIn. So you have all search ad revenues for Canada and Mexico PLUS SEO and the remainder of the search technology ecosystem as well as Social Media advertising for US, Mexico and Canada.

  • http://screenwerk.com Greg Sterling

    Thanks Kevin for helping clarify the source of the gap.