Tammy Campbell is an assistant professorial research fellow in the Centre for Analysis of Social Exclusion at the London School of Economics, and a British Academy postdoctoral fellow. She undertook her PhD at the UCL Institute of Education, working before that as a researcher in the Department for Education, and with children and young people in London, Japan, and Norway. Her interests include ‘month of birth effects’; disparities in attributions/provisions for children’s special educational needs and disabilities; stereotyping and bias; ‘ability’-grouping; inequalities in preschool education; and the intended and unintended ways in which the consequences of policies manifest.