Testing the effectiveness of testimonial ad campaigns

The Beckhams, the Rooneys and the cast of Harry Potter films – Brands like to use celebrities for marketing purposes. But just how effective are testimonial campaigns? Together with Celebrity

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respondi at the Printemps des Etudes 2015

On the 16th of April, it will be time again for the Palais Brongniart to open its doors for the Printemps des Etudes. This year, the two day trade fair

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