My research focus is studying the distribution of quasars across cosmic history. My specific interests include; constraining cosmology, and models of quasar activity and galaxy formation, by analyzing clustering within large surveys of quasars and galaxies; using proximate pairs of quasars and AGN to constrain models of quasar fueling and galaxy evolution; statistical lensing (cosmic magnification) as a trace of dark matter; and the development of rigorous probabilistic techniques to classify and characterize quasars in large imaging surveys.