Her research programme evaluates population dietary interventions and policies, such as food taxes/subsidies, front-of-pack nutrition labels, scalable healthier food choice interventions, and product reformulation. Her studies use a range of information technologies to deliver or evaluate interventions including smartphone apps, household food purchase scanner data, and automated wearable cameras. Cliona serves on a number of national and international advisory committees including Food Standards Australia New Zealand Social Sciences & Economics Advisory Group, and the New Zealand Health Star Rating Labelling Advisory Group. She is author of more than 180 peer-reviewed journal papers, Director of the HRC-funded "Dietary Interventions: Evidence & Translation" Programme (DIET) http://www.diet.auckland.ac.nz/, and Deputy Director of the Healthier Lives National Science Challenge.