In a recent NYT Op-Ed, economists Aaron Edlin of UC Berkeley and Yale's Ian Ayres propose to combat inequality with a tax that would automatically kick in when gap between the median income and the top 1% widens.  Aaron Edlin is a co-editor of the new book, Economists' Voice: Top Economists Take On Today's Problems (Columbia University Press, 2011) and Ian Ayres blogs for Freakonomics.