Clearsaleing has launched The American Attribution Index, designed to help online marketers allocate their marketing funds according to the most effective forms of advertising.
They've released aggregate indices for Q1 2009 (pdf) for small, medium and large advertisers defined in the following manner:
- AAI: Aggregate--Large Advertisers (> $2 million/year online ad spend)
- AAI: Aggregate--Medium Advertisers ($300k to $2 million/year online ad spend)
- AAI: Aggregate--Small Advertisers (< $300k/year online ad spend)
Here's how it broke down (key first):
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