Tim Harford and the More or Less team try to make sense of the statistics which surround us. From BBC Radio 4
http://www.bbc.co.uk/programmes/p02nrss1
Is breastfeeding the key to exam success?
A new study by researchers at Oxford University has linked better exam results at school with being breastfed as a baby. But how much faith can we put in the findings? Tim Harford speaks to Emily Oster, professor of economics at Brown University in the US and the author of three books about pregnancy and parenting.