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We suggest that the Baldwin Effect is a result of the spectral dependence of the line-driving ionizing continuum on the black hole mass. We derive a relationship between the mass of the central black hole and the broad emission line luminosity in active galactic nuclei (AGN). Assuming the UV spectrum of AGN is emitted from an optically thick medium we find an expression for the characteristic energy of the "UV bump" in terms of the observable luminosity and emission-line width. We showdoi:10.1086/308134 fatcat:pihamjk2fbchvofcv7ruimafme