The basic economics underlying the deals between Clearwire and both DirecTV and EchoStar are so compelling, that given decent execution and an increase in the rate of build out by Clearwire, the outcome could be a doubling of value of all three organizations. The underlying rules of thumb for valuations of pay TV and other operators are simple. They are essentially bound up in the amount of cash they can generate now and in the future, and the likelihood of this increasing or decreasing due to churn rates, average revenue per user and network improvement. A small change in Churn can create a large change in stock value. The stock market interest, the coming together of three determined corporate cultures…