  We present the results of reconstruction analysis of the galaxy distribution
in a spherical region of radius 50 Mpc/h centered on the Local Group, as mapped
by the IRAS Point Source Catalog Redshift Survey (PSCz). We reconstruct it
using 15 different models for structure formation in the universe, each
consisting of a set of assumptions regarding the value of the density parameter
Omega_m, and the amplitude and nature of the biasing between IRAS galaxies and
mass. For every model, we also reconstruct ten mock PSCz catalogs derived from
the outputs of numerical simulations that have the appropriate assumptions
about Omega_m and bias. We use a variety of statistics to compare the accuracy
of each reconstruction of the PSCz catalog to the accuracy expected based on
the corresponding mock catalog reconstructions. We find that gravitational
instability of Gaussian mass density fluctuations can account for the galaxy
distribution in the PSCz catalog, at least for some plausible assumptions about
the value of Omega_m and the bias. Unbiased models in which IRAS galaxies trace
mass fail to reconstruct the PSCz catalog accurately, both for Omega_m=0.4 and
for Omega_m=1. Low Omega_m models in which IRAS galaxies are antibiased with
respect to the mass are the most successful in reconstructing the PSCz catalog.
In particular, a model with Omega_m=0.4 and IRAS galaxies related to the mass
according to the predictions of a semi-analytic galaxy formation model is very
successful in reconstructing the PSCz galaxy distribution.
