There is little doubt that the Internet has altered the way U.S. consumers think about shopping. E-commerce sales grew 15.6 percent in 2016 and now account for 11.7 percent of all retail sales. Amazon accounts for a whopping 43 percent of those e-commerce sales. Amazon, in particular, has changed the way consumers think about e-commerce sales, or etail. If you live in a major city like Phoenix, which has a major distribution center, it is not uncommon to order items sold by Amazon and have them delivered the same afternoon.