Same as Figure 3, but varying the neighborhood parameter. Each analysis uses a maximum shell density ratio ﹩{\mathrm{log}}_{10}({\rm{SR}})=-4﹩ and a minimum mass ratio MR = 0.10. These curves are the results of varying the neighborhood parameter (NH = 75 ﹩{h}^{-1}﹩ kpc, red circles; NH = 50 ﹩{h}^{-1}﹩ kpc, orange squares; NH = 75 ﹩{h}^{-1}﹩ kpc, yellow triangles). The width of the shaded region is 50 times the Poisson uncertainty. The most restrictive NH value of 25 h⁻¹ kpc requires identified systems to be denser.