Jiajia Li was a visiting academic at the Oxford Institute of Population Ageing.

He currently holds the position of a Postdoctoral Fellow and Assistant Researcher at Institute of Population Research, Peking University. In 2024 he obtained his Ph.D. in Demography from Peking University. His research focuses on population health, health inequality, and the social determinants of health, with a strong emphasis on life course studies. He integrates longitudinal social and health data using multidisciplinary approaches and advanced statistical methods to explore how individual and societal factors influence health outcomes throughout the life course.