"Risk-sharing in federations: Theory and evidence"
with Ahmed Saber Mahmud, Faruk Balli and Sumit Joshi, November 2015.

"Does economic growth matter? Technology-push, demand-pull, and endogenous drivers of innovation in the renewable energy industry"
with Sam Aflaki and Andrea Masini, May 2017.

"Has the non-oil sector decoupled from oil sector? A case study of Gulf Cooperation Council countries"
Unpublished, March 2010.