Grace Yun Yi is a professor at the University of Waterloo, Canada, where she holds a University Research Chair in Statistical and Actuarial Science. Her research concerns event history analysis with missing data and its applications in medicine, engineering, and social science.
Yi earned bachelor's and master's degrees from Sichuan University, China, in 1986 and 1989. She moved to Canada and continued her studies with another master's degree from York University in 1996, and a Ph.D. from the University of Toronto in 2000 under the supervision of Donald A. S. Fraser. She came to Waterloo as a postdoctoral researcher, and then continued there as an assistant professor in 2001.
Yi won the CRM–SSC Prize of the Statistical Society of Canada in 2010. In 2015 she was elected as a Fellow of the American Statistical Association "for research excellence in developing statistical theory and methods, particularly in missing and mis-measured data; for important contributions to biostatistics; and for excellence in statistical education and mentoring students." Her work with Xianming Tan and Runze Li won the Canadian Journal of Statistics Award for 2016.