  We review the derivation of the Liouville action in 2DQG via the trace
anomaly and emphasize how a similar approach can be used to derive an effective
action describing the long wavelength dynamics of the conformal factor in 4D.
In 2D we describe how to make an explicit connection between dynamical
triangulations and this continuum theory, and present results which confirm the
equivalance of the two approaches. By reconstructing a lattice conformal mode
from DT simulations it should be possible to test this equivalence in 4D also.
