An Empirical Analysis of Energy Cost Pass-Through to CO2 Emission Prices
Shawkat Hammoudeh, Amine Lahiani , Duc Khuong Nguyen, Ricardo Sousa
Energy Economics, vol. 49, 2015, p. 149-156.

US Monetary Policy and Sectoral Commodity Prices
Shawkat Hammoudeh, Duc Khuong Nguyen, Ricardo Sousa
Journal of International Money and Finance, vol. 57, 2015, p. 61-85.

Energy Prices and CO2 Emission Allowance Prices: A Quantile Regression Approach
Shawkat Hammoudeh, Duc Khuong Nguyen, Ricardo Sousa
Energy Policy, vol. 70, 2014, p. 201-206.

What Explains the Short-Term Dynamics of the Prices of CO2 Emissions?
Shawkat Hammoudeh, Duc Khuong Nguyen, Ricardo Sousa
Energy Economics, vol. 46, 2014, p. 122-135.