"Pollution Offshoring and Emission Reductions in European and US Manufacturing", Ennvironmental and Resource Economics (2016). doi:10.1007/s10640-016-0035-1
"Measuring Environmental Regulatory Stringency", with Arik Levinson, Review of Environmental Economics and Policy 10(1), pp. 47-67, Winter 2016.
"Trade in Environmental Goods: A Review of the WTO Appellate Body's Ruling in US — Countervailing Measures (China)", with Rachel Brewster and Anna Maria Mayda. World Trade Review 15(2), pp. 327-349, April 2016.
Capitalizing on the Morocco-US Free Trade Agreement: A Road Map for Success, co-editor (with Gary Hufbauer), Peterson Institute for International Economics Policy Analysis 88, Washington DC, September 2009.
"What's On the Table? The Doha Round as of June 2009", (with Matthew Adler, Gary Hufbauer and Jeffrey Schott), Peterson Institute Working Paper, August 2009.
"Money for the Auto Industry: Consistent with WTO Rules?" (with Gary Hufbauer), Peterson Institute Policy Brief 09-4, February 2009.
Maghreb Regional and Global Integration: A Dream to be Fulfilled, co-editor (with Gary Hufbauer), Peterson Institute for International Economics Policy Analysis 86, Washington DC, October 2008.
"The US Congress and the Chinese Renminbi", (with Gary Hufbauer), Debating China's Exchange Rate Policy, Peterson Institute for International Economics, Washington DC, p.219-233, April 2008.
"Will Dollar Revive Following Dive?", (with Doug Dowson), The Omaha World Herald, December 30, 2007.