Currencies
"Reserves, Sanctions and Tariffs in a Time of Uncertainty," with M.Chinn & H.Ito, NBER WP 34177, Aug. 2025.
“Dollar Rivals,” in 50 Years of Floating, 2024, Douglas Irwin and Maurice Obstfeld, editiors (Columbia Univesrity Press for Peterson Institute for International Economics, Washington DC). HKS RWP 23-015, June 2023; NBER WP 31476, July 2023.
"Internationalization of the RMB and Historical Precedents," Journal of Economic Integration, 2012, vol.27, no.3, pp. 329-365.