Measuring energy security: Trends in the diversification of oil and natural gas supplies

作者：Cohen Gail; Joutz Frederick; Loungani Prakash^*

来源：Energy Policy, 2011, 39(9): 4860-4869.

DOI：10.1016/j.enpol.2011.06.034

• Energy security
• Energy independence
• OECD energy use

We present evidence on one facet of energy security in OECD economies-the extent of diversification in sources of oil and natural gas supplies. Viewed from the perspective of the energy-importing countries as a whole, there has not been much change in diversification in oil supplies over the last decade, but diversification in sources of natural gas supplies has increased steadily. We document the considerable cross-country heterogeneity in the extent of diversification. We also show how the extent of diversification changes if account is taken of the political risk attached to suppliers; the size of the importing country; and transportation risk.

• 出版日期2011-9