If you want to slice into America, it's pretty red, white, and blue in terms of how it goes about things, but there's a gray area there, and I've always been interested in where things are complicated.
Most of the time they buy what other people buy. They move in great schools, like bluefish, all identical. There is safety in numbers. If one wants Schnabel, they all want Schnabel, if one buys a Keith Haring, two hundred Keith Harings will be sold.