Luminosity dependence of the observed (circles) and intrinsic (squares) type-2 AGN fractions. The dashed line is the best fit to the intrinsic type-2 AGN fraction assuming no luminosity dependence. The solid line is the best fit assuming a power law dependence. Inset: probability density distributions of the best-fit power law index, α. The vertical lines represent the values of α expected in the receding torus models of Lawrence et al. (1991; ﹩\alpha \sim 0.5﹩) and Hönig & Beckert (2007; ﹩\alpha \sim 0.25﹩).