One of the highlights for Warc at last week's Cannes festival was the launch of the Effie Effectiveness Index - a global ranking of advertisers and agencies in the 40 or so Effie competitions that are held all around the world. We hope the index - which we developed with Effie Worldwide - will prove to be a useful tool for marketing people.

The first-ever rankings, all viewable on the free-to-access Effectiveness Index website, amply demonstrate the global nature of the initiative. The top agency within a network was Sancho BBDO, based in Bogota, Colombia. Top independent was Wieden + Kennedy, while the number one agency network and holding group went to BBDO Worldwide and Omnicom respectively.

In Cannes, I caught up with Matt Seiler, CEO of Mediabrands and chairman of Effie Worldwide, to talk about the Index.

Matt Seiler on the Effie Effectiveness Index (2:02)

If you'd like to know more, we at Warc have published an in-depth analysis of the Index for subscribers - it's available here.