Keisaku Higashida (Professor, School of Economics) gave a presentation on environmental regulations at 2023 NCU Conference on Trade, Economic Growth, and Environmental Economics, which was held on April 14th in Taoyuan, Taiwan. The aim of this conrerence is that researchers present their research outputs and discuss them for developing new ideas. More than 20 researchers participated in the conference, who mainly came from Taiwan, Japan, and Singapore. The topic of the presentation given by Keisaku Higashida was the analysis using the data obtained from a series of laboratory experiment. However, there were also theoretical analyses and empirical studies using the long-term data among other presentations. There were lively discussion, and participants could exchange valuable ideas.