Raja Rajamannar has a simple question for the data obsessives who want to turn marketing into a number-crunching business.
"How do you measure the value of a smile that you bring to the consumer's face when you advertise?" Rajamannar, the chief marketing and communications officer at payments company MasterCard, asked during a session hosted by The Economist magazine at CES 2018.
Expressed in a more thoroughgoing manner, he suggested that it may not be easy for brands to prove the return on investment (ROI) yielded from this kind of engagement,...