Justine is the director of the School of Economics and University of Cape Town (UCT) where she is she teaches Microeconomics. Her research interests include behavioral and experimental economics, trust and social capital, discrimination, labor markets, social networks, and intergenerational mobility. Her experimental work has focused on the effects of racial identity and income inequality on individual decision-making, as well as group cooperation in the provision of public goods. She has also published work on educational mobility, social assistance, and the impact of social networks on employment outcomes.