Where the things that government does makes sense and where things dont make sense. Physical infrastructure is a rather broad term and so we have a panel that is one part water and three parts transportation. Newsha ajami is Senior Research associate at the Stanford Woods Institute for the environment, director of urban water policy at water in the west. Matthew turner is professor of economics at brown who has written a bit about transportation. Dan wilson is at Federal Reserve bank in San Francisco and speaks only for himself and not for janet yellen or anybody else at the fed. And Cliff Winston is our colleague here at brookings. I have asked each to say pretend we had a president of the United States who has a short attention span. And pretend that he ran for office saying i want to spend a lot more money on infrastructure. Pretend for a moment that this tax credit thing was something thought up and will never resurface again, what would you tell him about how to wisely spend the m