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We examine the average pattern expected for the large-scale distortions of the Hubble flow driven by gravitational instability. We consider both bulk flow and shearing motions and present the probability distributions for observed radial velocities. We introduce statistical tools that can be used in galaxy peculiar velocity data analysis to distinguish between different competing scenarios for the evolution of large-scale structure in the universe. These statistical measures are very sensitive to differences in power spectra of primordial inhomogeneities when applied in a distance regime accessible to ongoing observational programs.
K. M. Górski (Thu,) studied this question.