with other surveys
=============================

It is instructive to compare the present results on the clustering of low-$z$ AGN with that of other surveys, both at low- and high-redshift, in order to get information about the connection between various galactic structures and their evolution. To avoid problems with different assumptions on the values of the slope $\gamma$, we decided to compare the values of the integrated TPCF at 20 $h^{-1}$ Mpc, $\bar{\xi}(20)$. When not directly available in the original paper, $\bar{\xi}(20)$ has been computed by integrating the TPCF with the best fitting values of $r_0$ and $\gamma$.

Comparison with other local AGN surveys
---------------------------------------

Using a low-redshift ($z\le 0.2$) sample, @bm93 measured the clustering properties of 183 AGN in the EMSS. They found evidence for a small value of the integrated TPCF, $\bar{\xi}=0.7\pm 0.6$ (computed at $10h^{-1}$ Mpc), corresponding to a correlation length of $r_0=5.0^{+1.9}_{-3.3} h^{-1}$ Mpc. The assumed slope for the TPCF is $\gamma=1.8$ and the resulting $\bar{\xi}(20)$ is $0.20\pm
0.17$. Considering the uncertainties, this result is slightly lower than or consistent with our results. Moreover, since the Boyle & Mo sample is obtained by identifications of X-ray sources, it contains fainter[^3] AGN than AERQS. As a consequence, a slightly 