“Half the money I spend on advertising is wasted; the trouble is I don't know which half.” Every marketer has heard this quote by John Wanamaker, but why it is so prevalent to this day when there’s more data, tools and expertise available than ever before? In our new podcast series Half Wasted we’ll discuss with some of today’s brightest marketing masterminds how they feel about John's quote, what marketing effectiveness requires from the marketers as well as from the companies, and why data isn't utilised in decision making as much as we like to think.