- "A Theory of Government Procrastination", with Taiji Furusawa, manuscript, January 2014.
- "Cumulative Innovation, Growth and Protection of Ideas", with Davin Chor, manuscript, December 2014. "Online Appendix -- No Scale Effect". (An earlier version of the paper titled "Cumulative Innovation, Growth and Welfare-Improving Patent Policy," was circulated as CESifo Working Paper No. 4407, September 2013.)
- "Fragmentation and Gains from Trade", with Han (Steffan) QI, manuscript, October 2018.
- "Patent Exhaustion Policy and International Production Sharing: Winners and Losers?", with Olena Ivus, manuscript, October 2017.
- "International Payment Flows and the Potential of the RMB as a Significant Payment Currency", with Isabel K.M. YAN, manuscript, July 2020. An earlier version by Edwin L.-C. Lai (single-authored) was published as Hong Kong Institute of Monetary Research Working Paper No.07/2020 in May 2020. https://www.aof.org.hk/docs/default-source/hkimr/working-papers/full-text4d9ee994bb014db89f7ed05ac2a315c9.pdf?sfvrsn=269fa4e5_0