Title: Assessing the impact of bulk and shear viscosities on large scale structure formation,
Abstract: It is analyzed the effects of both bulk and shear viscosities on the
perturbations, relevant for structure formation in late time cosmology. It is
shown that shear viscosity can be as effective as the bulk viscosity on
suppressing the growth of perturbations and delaying the nonlinear regime. A
statistical analysis of the shear and bulk viscous effects is performed and
some constraints on these viscous effects are given.