sort of concerned about this assumption that this is exogenous because drivers are still making entry decisions based on their kind of expected earnings in the platform so it's not as if they're completely ignoring how they're going to do but I think if you wanted to refine it a bit you could think about making this something which is endogenous okay so that's that's basically the the model of what's going on and so if you look at the picture of what's happening here there's two reasons that there's available drivers there's either new