Advertising CPM Finance ROI 
Harvard Business Review
NOVEMBER 3, 2014
Many marketers have reported rapid and significant ROI from adopting these tools; but first, they had to convince higher-ups to make the up-front investment. Over a century ago retail and advertising pioneer John Wanamaker said, “Half the money I spend on advertising is wasted; the trouble is I don’t know which half.”
Harvard Business Review
NOVEMBER 3, 2014
Many marketers have reported rapid and significant ROI from adopting these tools; but first, they had to convince higher-ups to make the up-front investment. Over a century ago retail and advertising pioneer John Wanamaker said, “Half the money I spend on advertising is wasted; the trouble is I don’t know which half.”
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