Dr Cheng Qiqi obtained his BA and PhD in economics from Zhejiang University. His research interest is individual decision-making, with a focus on risk decision-making, intertemporal decision making, and lying behavior. He is currently a Research Fellow at the Child Development Lab of the National University of Singapore, and previously was a postdoctoral fellow in the Department of Psychology at Zhejiang University. In this lab, his work focuses on studying what consists of perceived costs and benefits when children are tempted to lie, and the impact of these costs and benefits on children's lying behavior. He also intends to study children's risk-taking behavior.