Sonia is investigating institutional and behavioural constraints upon the creation of human capital. She has active research programmes on the long run benefits of childhood health interventions, educational reform, conflict, the political economy of public service delivery, intergenerational transmission of human capital and poverty, and the dynamics of mortality, fertility and sex selection. Her research is in collaboration with economists and some non-economists located in the US, Europe, India, Brazil, Chile and Mexico. She is currently analysing survey and census data from a number of developing countries, historical data from America, Norway, Denmark and Sweden and cross-country micro-macro data. Her research has been funded by grants from the ESRC, DFID, Nuffield Foundation and Grand Challenges Canada.