"Princeton University health economist Uwe Reinhardt offered the most dire and pessimistic assessment of the marketplaces' future. Namely, he believes they've already entered a death spiral and are heading toward total collapse.... [Mr. Reinhardt said:] 'If you got a bunch of Princeton undergrads to design a health care system, maybe they would come up with an arrangement like the marketplaces. The natural business model of a private commercial insurer is to price on health status and have the flexibility to raise prices year after year. What we've tried to do, instead, is do community rating [where insurers can't price on how sick or healthy an enrollee is] and couple it with a mandate.' "  MORE >>