I'd be happy to take that one, or at least take a first crack at it.
We're always looking for efficiencies in the system. That includes things like fraud reduction and better credit scoring. We build technologies right into VisaNet that help to reduce those costs. Certainly, as we've moved to chip, there's been some favourable early results in terms of fraud reduction, which we think is good news for the system as a whole.
There's an important element to remember, I think, as we move to the new technologies, which is that they often co-exist with previous technologies. As David and I think Don said earlier, the card that you're carrying today, in the same way that it still has the raised numbers on it for when you run into one of those click-click machines, will probably be in your pocket for a long time to come.
So the enablement on a cellphone is probably going to run in parallel, for the foreseeable future, with the plastics you have today. So I would just temper expectations on that front in terms of significant cost reductions.