  A pair of recent Monte Carlo studies have reported evidence for and against a
crossover from weak to strong-disorder criticality in the one-dimensional dirty
boson problem. The Monte Carlo analyses rely on measurement of two observables:
the effective Luttinger parameter K_{eff} and the superfluid susceptibility
chi. The former quantity was previously calculated analytically, using the
strong-disorder renormalization group (SDRG), by Altman, Kafri, Polkovnikov,
and Refael. Here, we use an extension of the SDRG framework to find a
non-universal anomalous dimension eta_{sd} characterizing the divergence of the
susceptibility with system size: chi ~ L^(2-eta_{sd}). We show that eta_{sd}
obeys the hyperscaling relation eta_{sd} = 1/2K_{eff}. We also identify an
important obstacle to measuring this exponent on finite-size systems and
comment on the implications for numerics and experiments.
