  A unique analytical result for the Migdal-Kadanoff hierarchical lattice is
obtained. The scaling of the defect energy for a zero-dimensional spin glass is
derived for a bond distribution that is continuous at the origin. The value of
the ``stiffness'' exponent in zero dimensions, y_0=-1, corresponds to the value
also found in one dimension. This result complements and completes earlier
findings for y_d at d>0.
