Formation Efficiencies of Old Globular Clusters - from Dwarf to Giant
  Galaxies
  For the full galaxy mass range, we find that previously observed trends of
globular cluster (GC) system scaling parameters (number, luminosity or mass of
all GCs in a galaxy normalized to the host galaxy luminosity or mass, e.g. S_L)
as a function of galaxy mass, holds irrespective of galaxy type or environment.
The S_L-value of early-type galaxies is, on average, twice that of late-types.
We derive theoretical predictions which describe remarkably well the observed
GC system scaling parameter distributions given an assumed GC formation
efficiency ({\eta}), i.e. the ratio of total mass in GCs to galaxy halo mass.
It has a mean value of {\eta}=5.5e-5 , and an increasing scatter toward low
galaxy mass. The excess {\eta}-values of some massive galaxies compared to
expectations from the mean model prediction, may be attributed to an efficient
GC formation, inefficient production of field stars, accretion of low-mass
high-{\eta} galaxies or likely a mixture of all these effects.
