A better model would probably be a Markov chain, where the states are "don't want to die", "want to die", and "dead". If you can show that the transition probab

A better model would probably be a Markov chain, where the states are "don't want to die", "want to die", and "dead". If you can show that the transition probability to wanting to die is very low, then you could show that you'll want to live a hell of a lot longer than is currently possible.