Naixin Huang is a Ph.D. candidate in economics from Tsinghua University. Her research with HCP research associate Dr. Mun S. Ho and visiting Prof. Jing Cao focuses on the global carbon price floor's welfare effects and optimal design. The 2°C goal is challenging to reach, and it will be essential to consider the international differences in mitigation costs and benefits. IMF (2021) proposes a system of global carbon prices in which countries at different economic levels assign different carbon prices. Using a global trade model, she and colleagues seek to illustrate the impact of such a differentiated price floor system. Then, they seek an alternative design for the worldwide carbon price floor. Besides the global carbon price floor, she and visiting Prof. Jing Cao also researched international climate finance’s welfare effects and optimal design.