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In order to reveal the stylized facts of world crude oil prices, R/S (Rescaled Range Analysis) method is introduced in this paper. For illustration, WTI (West Texas Intermediate) and Brent daily crude oil prices are used in this paper. The calculated results show that both Hurst exponents (H) are larger than 0.5 and both memory terms are 12 days coincident. The results tell that these two oil prices...
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