Andrew Pole had just started working as a statistician for Target in 2002, when two colleagues from the marketing department stopped by his desk to ask an odd question: "If we wanted to figure out if a customer is pregnant, even if she didn't want us to know, can you do that? "
A look at how Target and other retailers tap psychology, statistics, and big data to determine when to offer rewards or coupons and how to make shopping habitual, including knowing when you're pregnant.