... the abilities of poor and non-poor children were not due to differences in the education of the children’s mothers, the structure of the children’s families or the age of the mother. US studies ... child birth weight and the education of the mother. Unlike Case et al (2002) for the US and Currie and Stabile (2002) for Canada we find no evidence of a significant deepening of the contemporaneous ... the top 5 percent of the symptom distribution and for poor mother reported health. On the other hand, if we compare the change from 21 to 81 months, there is some steepening of the association...