The UCLA Department of Economics is saddened to announce the passing of Professor Emeritus Masanao Aoki (May 14, 1931—July 24, 2018), he was 87 years old. Professor Aoki earned a BA and MSc in Physics from the University of Tokyo, and he earned a PhD in engineering from UCLA in 1960. He taught engineering at both UCLA and UC Berkeley from 1960-1974 before switching to economics. He remained a professor of economics until his retirement in 2002. Professor Aoki was an influential academic who bridged intellectual gaps between his two fields. His contributions to both economics and engineering cannot be understated. Our faculty and staff extend their heartfelt condolences to the professor’s surviving family, friends, and colleagues.