Virtually all social science research related to obesity uses body mass index (BMI), usually calculated using self-reported values of weight and height, or clinical weight classifications based on BMI. Yet there is wide agreement in the medical literature that such measures are seriously flawed...

Early education and childcare can have a critical impact both on helping children to develop and in supporting parents (especially mothers) to work. But childcare can also have a significant impact on the disposable income - and, hence, living standards - of families with very young children....