Analytical integration of the PDF of interdistances from an exponential mass PDF and a Gaussian intervelocity PDF, compared to various expectations. Blue curve: the exact integral; red dashed curve: pure power law with exponent −1.9; the black dashed curve: precise fit of deprojected data; and green dashed curve: Hubble profile P(r)∝(1 + r/a)^−2.1 with a = 0.05. As expected, the analytical integral is no longer valid at very small distances r <  0.1 Mpc.