Measured values of the K-estimator as a function of transverse distance (points with error bars) compared to the expected behaviour for a population strictly following a power-law correlation function. Left: five curves represent different power-law indices as given in the legend, for a fixed value of r₀ = 3.6 h⁻¹ Mpc. Right: same details for five different correlation lengths at fixed γ = 1.3. The central (thick solid) curves always indicate the minimum χ² best-fit values. The horizontal straight line shows the no-clustering expectation value of K. The error bars are calculated with the bootstrapping technique described in Sect. 3.1.3.