Notice in table 6 that the common support (cs) percentage of mothers decreases from approximately 92% in set I to 50% in set III for the formal and informal subsamples, while the cs percentage of non-mothers decreases from 90% to 42% in the formal sector and from 95% to 57% in the informal sector. After matching on age and year, 1 % is accounted for by differences in the support (AM = -0.1% and ANm = 1-1%) and differences in the distribution of individual characteristics in the common support explain 3% (Ax), while Ao = -4% is the unexplained motherhood wage gap. Most is accounted for by the components that exist because of unmatchable mothers (AM = -4.6%) and non-mothers (A^ = 3.6%).