  Jet quenching as observed via high p_T hadron production is studied in the
HIJING1.35 model. We test the model on recent WA98 data on 160 AGeV Pb+Pb ->
pi0 up to 4 GeV/c. The results depend sensitively on the model of the Cronin
effect. At (RHIC) collider energies (s^1/2 > 200 AGeV), on the other hand,
semi-hard hadron production becomes insensitive to the above model and is thus
expected to be a cleaner probe of jet quenching signature associated with
non-Abelian radiative energy loss.
