Silicon Valley

Sally Kohn: What is distinctive about this cluster of businesses that comprises the US. Texan? She says it's an astonishing incestuous network set of relationships, which at one level are quite unbusinesslike in their approach to money because ultimately, I think they think money's cheap. And so the less time you spend worrying about boring mundane things like cash management and the stability of your bank - that's very, very, very old economy. The hot news is really the latest tech innovation, she says.