Upper left panel: distribution of [Fe/H] for the 219 bulge clump stars in Baade’s window (thick histogram) and distribution of [Fe/H] for the 162 star subsample for which [Mg/H] is measured (hatched histogram). Upper right panel: distribution of [Mg/H] for the 162 bulge clump stars in Baade’s window. Lower left panel: smoothed distribution of [Fe/H] derived from the upper panel, with its associated variability band. The initial metal-rich side of the distribution (dashed line) has been stretched (full line) to make it consistent with the error law and to achieve the deconvolution (see text). Lower right panel: smoothed distribution of [Mg/H] derived from the upper panel, with its associated variability band (see text).