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We present evidence that AGN do not reside in ``special'' environments, butinstead show large-scale clustering determined by the properties of their hostgalaxies. Our study is based on an angular cross-correlation analysis appliedto X-ray selected AGN in the COSMOS and UDS fields, spanning redshifts from$z\sim4.5$ to $z\sim0.5$. Consistent with previous studies, we find that AGN atall epochs are on average hosted by galaxies in dark matter halos of$10^{12}-10^{13}$ M$_{\odot}$, intermediate between star-forming and passivegalaxies. We find, however, that the same clustering signal can be produced byinactive (i.e. non-AGN) galaxies closely matched to the AGN in spectral class,stellar mass and redshift. We therefore argue that the inferred bias for AGNlies in between the star-forming and passive galaxy populations because AGNhost galaxies are comprised of a mixture of the two populations. Although AGNhosted by higher mass galaxies are more clustered than lower mass galaxies,this stellar mass dependence disappears when passive host galaxies are removed.The strength of clustering is also largely independent of AGN X-ray luminosity.We conclude that the most important property that determines the clustering ina given AGN population is the fraction of passive host galaxies. We also inferthat AGN luminosity is likely not driven by environmental triggering, andfurther hypothesise that AGN may be a stochastic phenomenon without a strongdependence on environment.

The clustering of X-ray AGN at 0.5 < z < 4.5: host galaxies dictate dark matter halo mass