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\subsection{Comparison \section{Comparison  with X-ray-selected AGN pairs} Both \citet{Liu_2011} and \citet{Koss_2012} use imaging spectroscopy to select data points for dual (pair) AGN samples. Dual AGN with small pair separation are used for analysis in both studies, with most of the Lui AGN detections at separation less than 100 kpc, and those of \citet{Koss_2012} found at separations less than 30 kpc. Both papers note that the luminosities of AGN pairs increase with a decrease in separation between galaxies (in a pair), suggesting that mergers promote AGN activity ( \cite{Liu_2011,Koss_2012} ). Both papers also acknowledge the limitations experienced in selecting the appropriate sample data due to SDSS’ fixed fiber size. On this point, Koss notes that due to SDSS fiber being 3”, it is less sensitive to smaller physical scales.