and one man knows all about it, in his book, "the rule of logistics emco professor jesse lecavalier takes look at the intricate nature of keeping things running. have the logistics of walmart affected your life? the professor joins us now. talk to me about how it affects my life here, living in new york. pretty hard to get to a walmart, why does it affect me? jesse: first of all, thank you for having me. the reach of walmart is hard to underestimate in terms of their impact on every aspect of logistics, the supply chain, and so the way that they control their own costs likely affects the way that you might buy something in new york. so, they are famous for having a wide influence on consumer prices because of their own margins that they are trying to control. that has a knock on effect through a range of products. they have been very influential in shaping other kinds of logistical models that now we see active in competitors like amazon. romaine: it is. when we talk about amazon it's not a retailer really, it's a logistics company and i guess you can call walmart that as well. in your re