  In the past decade the observation of cross section modification for leading
hadrons, heavy flavor and two particle correlations in heavy ion collisions has
provided important insights into the dynamics of parton propagation in dense
strongly-interacting matter. The development of the theory of reconstructed
jets and related experimental measurements have further shed light on the
characteristics of in-medium parton showers. So far, experimental results from
ultra-relativistic nuclear collisions at RHIC and LHC have been analyzed in the
framework of parton energy loss, where the precision of the theoretical
predictions cannot be systematically improved. Only recently have higher order
calculations and applications of resummation and evolution to heavy ion
collisions begun to emerge. Several examples of such advances are discussed in
these proceedings.
