  We address two important cosmological questions relating to dwarf galaxies:
(1) What is their contribution to the field galaxy baryon budget; and (2) what
is their contribution to the faint blue galaxy problem. Both of these are
addressed empirically from a complete photometric redshift catalogue derived
from the Hubble Deep Field. The answer to the first question is: very little
(<1%), and to the second: a small but non-negligible amount (10% at b = 24 mags
rising to 30% at b = 28 mags). Hence the cosmological significance of dwarf
galaxies, from a purely baryon-centric perspective, lies in their contribution
to the formation and assembly phase of the giant galaxies - where perhaps they
did once dominate the baryon budget.
