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Regionalization in the World Crude Oil Market

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  • S. Gurcan Gulen

Abstract

According to Weiner (1991), the world oil market is said to be unified' if prices for same quality crude oils from different regions of the world move together and regionalized otherwise. This hypothesis of Weiner is kept unchanged. However, we are more interested in the efficiency implications of a regionalized world oil market than its policy implications as discussed by Weiner. Specifically, if these prices deviate from each other, i.e., the market is fragmented, there will be arbitrage opportunities for crude oil traders which would render the market inefficient. In this paper, the regionalization hypothesis is investigated via cointegration tests using both spot and contract prices for fifteen crude oils. Three groups of similar quality crudes are formed based on API gravity and sulfur content. Tests of cross-group co-movement which provided evidence for significant quality differences between heavy and light crudes further supported our groupings. Then the co-movement of prices is tested within each group. The crash in 1986 is explicitly dealt with following methods described in Perron (1989). Results indicate that the world crude oil market is unified over the 1980-95 period.

Suggested Citation

  • S. Gurcan Gulen, 1997. "Regionalization in the World Crude Oil Market," The Energy Journal, International Association for Energy Economics, vol. 0(Number 2), pages 109-126.
  • Handle: RePEc:aen:journl:1997v18-02-a06
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    Cited by:

    1. Maslyuk, Svetlana & Smyth, Russell, 2008. "Unit root properties of crude oil spot and futures prices," Energy Policy, Elsevier, vol. 36(7), pages 2591-2600, July.
    2. Kaufmann, Robert K. & Dees, Stephane & Mann, Micheal, 2009. "Horizontal and vertical transmissions in the US oil supply chain," Energy Policy, Elsevier, vol. 37(2), pages 644-650, February.
    3. Zavaleta, Armando & Walls, W.D. & Rusco, Frank W., 2015. "Refining for export and the convergence of petroleum product prices," Energy Economics, Elsevier, vol. 47(C), pages 206-214.
    4. Atanu Ghoshray and Tatiana Trifonova, 2014. "Dynamic Adjustment of Crude Oil Price Spreads," The Energy Journal, International Association for Energy Economics, vol. 0(Number 1).
    5. repec:eee:eneeco:v:71:y:2018:i:c:p:114-127 is not listed on IDEAS
    6. Szymon Wlazlowski & Bjorn Hagstromer & Monica Giulietti, 2011. "Causality in crude oil prices," Applied Economics, Taylor & Francis Journals, vol. 43(24), pages 3337-3347.
    7. Ghoshray, Atanu & Johnson, Ben, 2010. "Trends in world energy prices," Energy Economics, Elsevier, vol. 32(5), pages 1147-1156, September.
    8. Chen, K.C. & Chen, Shaoling & Wu, Lifan, 2009. "Price causal relations between China and the world oil markets," Global Finance Journal, Elsevier, vol. 20(2), pages 107-118.
    9. Kaufmann, Robert K. & Ullman, Ben, 2009. "Oil prices, speculation, and fundamentals: Interpreting causal relations among spot and futures prices," Energy Economics, Elsevier, vol. 31(4), pages 550-558, July.
    10. Ozdemir, Zeynel Abidin & Gokmenoglu, Korhan & Ekinci, Cagdas, 2013. "Persistence in crude oil spot and futures prices," Energy, Elsevier, vol. 59(C), pages 29-37.

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    JEL classification:

    • F0 - International Economics - - General

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