Why Commodity Prices are Likely to Fall," Project Syndicate, August 23, 2022.

Comment at G-20 High-Level Ministerial Conference on, Tackling the Covid-19 crisis – Restoring Sustainable Flows of Capital and Robust Financing for Development, July 8, 2020.

"The Currency-plus-Commodity Basket Peg: A Proposed Monetary Regime for Commodity-Exporting Countries" Ppt or pdf presentation, for LACEA, Guayaquil, Ecuador, Nov.9-10, 2018.

"Macroeconomic determinants of commodity prices." Ppt slides (pdf), National Minerals Information Center Seminar Series, US Geological Survey, Reston, VA, August 23, 2018

"Macroeconomic determinants of international commodity prices," Ppt slides (pdf), Keynote Address International Commodities Symposium, Univ. of Colorado Denver Business School, August 13-15, 2018.

"Coping with commodity price volatility: an idea for exporting countries," GlobalDev, Feb. 8, 2018.

“Four Policy Proposals for Commodity Exporters,” MENA Seminar Series, World Bank, DC, Jan. 10, 2018.  Ppt slides.  

"Four Proposals to Help Commodity-Exporters Cope with Price Volatility," VoxEU, Oct.19, 2017.

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“Policies for Managing External Shocks in Commodity-Exporting Countries,“ ppt, Conference on Current Account Sustainability, InterAmerican Development Bank, Apr.18, 2017.

"How Commodity Exporters Can Cope with Price Volatility: Four Proposals,”(pdf).  High Level Seminar, Natural Resources, Finance & Growth, sponsored by Bank of Algeria, Algiers, May 28-29, 2016, pptpdf. OCP, Casablanca, June 3, pptpdf.  AAEA, Boston, Aug. 1, 2016; ppt pdf