How Ad Labels Change CTRs

Alec Green suggests click-through rates on paid search ads change when labeled as advertisements rather than sponsored links. He tells us that Google officially retired the "Sponsored Links" term on all English language domains, and will roll out other language shortly. Green points to a study by a Harvard Business School professor that suggests this change could pose a far more serious threat to CTR than Instant Previews, which covers ads.
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Tags: ppc, search
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