[1] Energy Economics Institute, CNOOC, Dongcheng District, Beijing, No. 25, Chaoyangmen North Road
[2] Department of Business Administration, China University of Petroleum, Changping District, Beijing, No. 18, Fuxue Road
[3] Association for the Study of Peak Oil and Gas, SE-756 55 Uppsala
[4] China's Oil and Gas Exploration and Development Company, CNPC, Xicheng District, Beijing, No. 6, Fuchengmen North Road