Dr. Ng has been co-Investigator on several foundation and NIH studies that use ‘big-data’ on commercial store sales, household purchase, and nutrition label data at the barcode level (scanner data), alongside dietary intake and nutrition databases. Analyzing such data, she has studied how policies such as taxation or quotas affect consumer purchases, diet, nutrition, and health outcomes across many settings. In addition, Dr. Ng has analyzed historical time-use data from a range of countries to estimate activity levels across domains of daily living and to identify trends and patterns by subpopulations.