right you know how is it setting a pricing policy I need to be able to tell you what the incentives are of passengers and what the incentives are our drivers and that's all sort of the strategic aspect of the model I also want to be able to tell you you know exactly even fixing all of this you know how how does the system evolve what are the dynamics of drivers and passengers okay so some an apology I want to interject here is that I think this is a talk I personally view as sort of at the tip of a very large iceberg and in many ways