Four researchers with Duke's Nicholas Institute for Environmental Policy Solutions are keying on that last word -- solutions -- in a new paper outlining a "common elements" approach to market-based compliance with the Clean Power Plan. As the authors note, "pursuing market mechanisms under the Clean Power Plan may raise economic, administrative, and political concerns for some states." Accordingly, for those states interested in market-based strategies, they propose "a regulatory approach whereby state plans could incorporate a range of potentially...