We note with sadmess the passing of HCEO member Seong Hyeok Moon, who passed away at his home in Seoul June 18, 2024. He had been active in the Institute of Economic Research of Seoul National University. He was a Research Fellow at Economics Research Center in the Department of Economics, University of Chicago. He received his Ph.D. in economics at the University of Chicago in 2011. His research interests include empirical labor economics and micro-econometrics, with a particular focus on skill formation, intergenerational transmission and early childhood intervention. His work has been published in journals such as Journal of Public Economics and Quantitative Economics.