  The halo approach to large scale structure provides a physically motivated
model to understand clustering properties of galaxies. An important aspect of
the halo model involves a description on how galaxies populate dark matter
halos or what is now called the halo occupation distribution. We discuss a way
in which clustering information, especially in the non-linear regime, can be
used to determine moments of this halo occupation number. We invert the
non-linear part of the real space power spectrum from the PSCz survey to
determine the second moment of the halo occupation distribution in a model
independent manner. The precise measurement of higher order correlations can
eventually be used to determine successive higher order moments of this
distribution.
