Before revision:  Our work sheds new light on the role of oil prices in shaping the world economy by investigating the metabolic paths of value across trade between 1960 and 2010 , by means of Markov Chain  analysis.
After revision:  Our work sheds new light on the role of oil prices in shaping the world economy by investigating the metabolic paths of value across trade between 1960 and 2011 , by means of Markov Chain analysis.