• w(θ) isn’t so hard to measure from various
surveys – just need positions.
•  ξ(r) is harder – must have redshifts to do
properly.  Can make some assumptions however.
• Observationally verified parameterization works
for scales of 100 h-1 kpc to 10 h-1 Mpc, and you get
r0 = 5 h-1 Mpc and γ = 1.8.  Note use of “h”.