We know that Summers would be more worried about unemployment than inflation today — but how much more worried? More worried than the Fed already is or less so? Here are three questions for Summers that would fill in some of the blanks about what we know he thinks about the Fed and what we need to know.  What should the Fed do when interest rates hit zero?  Is 2 per cent the right inflation target?  Is the Fed a bubble cop?  Lawrence Summers’ Policy