a) and b) show the spectroscopic ages as a function of spectroscopic surface gravity for the metal-poor and metal-rich bulge dwarfs, respectively. c) and d) show the difference between absolute magnitude inferred from microlensing techniques and from spectroscopy as a function of inferred spectroscopic mass for the metal-poor and metal-rich bulge dwarfs, respectively. (Compare Figs. 2 and 3 in Nataf & Gould 2012).