  We compare an analytic model of jet quenching, based on the GLV non-Abelian
energy loss formalism, to numerical results for the centrality dependent
suppression of hadron cross sections in Au+Au and Cu+Cu collisions at RHIC.
Simulations of neutral pion quenching versus the size of the colliding nuclear
system are presented to high transverse momentum pT. At low and moderate pT, we
study the contribution of medium-induced gluon bremsstrahlung to single
inclusive hadron production. In Pb+Pb collisions at the LHC, the redistribution
of the lost energy is shown to play a critical role in yielding nuclear
suppression that does not violate the participant scaling limit.
