Raul. there was recently a study done about cell phone use by drivers, when people are driving a car, and there's a debate about whether that should be banned and the figure was that some two thousand people die as a result of accidents each year using cell phones and yet the cost benefit analysis which was done by the center for risk analysis at Harvard found that if you look at the benefits of the cell phone use and you put some value on the life, it comes out about the same because of the enormous economic benefit of enabling people to take advantage of their time, not waste time, be able to make deals and talk to friends and so on while they're driving doesn't that suggest that it's a mistake to try to put monetary figures on questions of human life? well I think that if the great majority of people tried to derive maximum utility out of a service like using cell phones and the convenience that cell phones provide that sacrifice is necessary for satisfaction to occur.