Next time try posting links that doesn't need subscription - not all of us here are backed by institutions to read hacker news :-) http://www.rand.org/pubs/wor

Next time try posting links that doesn't need subscription - not all of us here are backed by institutions to read hacker news :-) http://www.rand.org/pubs/working_papers/2010/RAND_WR637-1.pdf http://www.rand.org/pubs/working_papers/2010/RAND_WR637-1.pd... (viewer: http://docs.google.com/viewer?url=http%3A%2F%2Fwww.rand.org%2Fpubs%2Fworking_papers%2F2010%2FRAND_WR637-1.pdf http://docs.google.com/viewer?url=http%3A%2F%2Fwww.rand.org%...) (scribd: http://www.scribd.com/full/49777774?access_key=key-1z4k6uefp6ug6ewa282e http://www.scribd.com/full/49777774?access_key=key-1z4k6uefp...) Not as well formated as ScienceDirect (which is sourced from the Journal of Health Economics) but doesn't require a subscription.