One recent study using nationally representative longitudinal survey data considered the role of prior problem behavior in disparate suspension rates. (educationnext.org)
Statistical controls for children's prior problem behaviour reduce the effects of low family income on children's behavioural problems by about half.3 - 8 (child-encyclopedia.com)
Mercier acknowledged the difficulties but said he had tweaked the combinations of metals in his chemical reactor to address prior problems. (scientificamerican.com)