Jason Zweig's "The Intelligent Investor: What's Eating Your Munis?" in this weekend's Wall Street Journal revisits excessive markups in the municipal bond market. His article cites SLCG's recently completed analysis of 20 million trades in long term municipal bonds between 2005 and 2013. Geng Deng and Craig McCann are the principal authors of the study. Their findings are reported in Using Emma to Assess Municipal Bond Markups.