following it's been shown that pregnant women change their consumer behavior they switch to unscented cosmetic products they start buying cotton wool pads and when these customers then go on to buy products like baby clothes just proving that they did have a baby you can look at what they bought before and say ok people who buy things like that are most likely pregnant. it's worth the time machine or. the secret lies in the evaluation of so-called big data autodidactic machines recognize the patents and amazon is considered the leader in this field i don't know. when we look at which technologies will be important in 10 or 20 years' time a large data set is actually the decisive factor and many retailers think they can't keep up unless they start screening their customers too they want to know how customers tick just as amazon doubts. in seattle amazon is testing