HAMILTON, JAMES D. (2009): «Causes and Consequences of the Oil Shock of 2007‐08», Brookings Papers Spring on Economic Activity (primavera 2009). URL: http://www.brookings.edu/economics/bpea/~/media/Files/Programs/ES/BPEA/2009_spring_bpea_papers/2009_spring_bpea_hamilton.pdf