kind of a technical statement of that okay so let me conclude so a bunch of different things that we were trying to do in this in this work and so some things I didn't you know managed to get to network modeling with multiple regions when I say our main insights generalize I mean they generalize sort of to the extent that we're you know able to characterize this difference between static and dynamic pricing we haven't accounted for ETA sort of in the way that David asked about right aggregate welfare is something like I