How Sovereign is Sovereign Credit Risk?" Longstaff, Francis A., Jun Pan, Lasse H. Pedersen and Kenneth J. Singleton. American Economic Journal: Macroeconomics Vol. 3, No. 2 (2011): 75-103.
The Simple Economics of Commodity Price Speculation." Knittel, Christopher R., and Robert S. Pindyck. American Economic Journal: Macroeconomics Vol. 8, No. 2 (2016): 85-110.