The Evolution of the Market By Mark Ahlstrom, Erik Ela, Jenny Riesz, Jonathan O'Sullivan, Benjamin F. Hobbs, Mark O'Malley, Michael Milligan, Paul Sotkiewicz, and Jim Caldwell Digital Object Identifier 10.1109/MPE.2015.2458755 Date of publication: 20 October 2015 60 ieee power & energy magazine 1540-7977/15©2015IEEE november/december 2015