Acta Univ. Agric. Silvic. Mendelianae Brun. 2016, 64, 1285-1293
Published online 2016-08-30

Short‑Term and Long‑Term Relationships Between Prices of Imported Oil and Fuel Products in the U. S.

Václav Adamec

Department of Statistics and Operations Research, School of Business and Economics, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

In this study, we analyzed a system of five monthly time series integrated I(1): average price of crude oil imported to the U.S. from OPEC countries (Opec), imported oil price from other than OPEC countries (NonOpec) in USD per barrel, average price of regular gasoline in the U.S. (Regular), premium quality gasoline price (Premium) and kerosene price (Kerosene) in U.S. cents per gallon. Cointegration was established by EG test and the series were analyzed by VECM model with lag selected via BIC criterion. Cointegration rank was determined by the Johansen procedure. According to VECM coefficients, prices of oil from OPEC countries and beyond OPEC exert influence upon all commodity prices in the system, but in a contradictory manner. Responses to innovation shocks in Opec and NonOpec stabilized within 8 to 10 months upon a nonzero shift and further became permanent. Innovation shock in both types of gasoline and Kerosene had only short-term significant impact upon the system. Forecast error variance in all variables is explained mainly by variation in oil prices, especially Opec, which persists with increased horizon. For a short horizon h = 1, FEVDs in gasoline and kerosene prices are primarily made of variation in the respective fuel prices.


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