I am broadly interested in macroeconomics, public economics and international economics, and particularly interested in  long-term global economic issues, including global demographic change, international climate policies, and global collective action. Technically, I have been working on general equilibrium modeling, including computable general equilibrium models, dynamic general equilibrium models, and overlapping generation models. I am also interested in econometric skills especially vector autoregressive models, and causal inference approaches. I am skilled at multiple programming languages, and have extensive experience in processing large data sets from global economic databases. 

I am also interested in game theory with a particular focus on externalities and public goods. Many international issues including climate change involve strong externalities, and require global collective action. I am keen on probability theory and the history of economic thoughts, and interested in global history and geography.  I enjoy discussions with students, and have supervised about 30 PhD and master students. I have been a consultant for the Brookings Institution, the International Monetary Fund, the Australian Treasury, and a number of large corporations.