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Examining Asymmetric Behavior in US Petroleum Futures and Spot Prices

Bradley T. Ewing, Shawkat M. Hammoudeh and Mark A. Thompson

Year: 2006
Volume: Volume 27
Number: Number 3
DOI: 10.5547/ISSN0195-6574-EJ-Vol27-No3-2
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This paper uses the momentum-threshold autoregressive (M-TAR) model to examine the possible asymmetric relationship between petroleum futures and spot prices for three different markets: crude oil, heating oil, and gasoline in the United States. The results indicate that the futures and spot prices for each petroleum type are cointegrated when allowing for asymmetric adjustment for each of these energy markets. We further investigate the asymmetric behavior between the futures and spot prices by estimating the M-TAR error-correction model. The M-TAR model allows us to document the adjustments that these markets undergo in response to changes in the basis.

Threshold Cointegration Analysis of Crude Oil Benchmarks

Shawkat M. Hammoudeh, Bradley T. Ewing and Mark A. Thompson

Year: 2008
Volume: Volume 29
Number: Number 4
DOI: 10.5547/ISSN0195-6574-EJ-Vol29-No4-4
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The paper examines the dynamic relationship between pairs of four oil benchmark prices (i.e., West Texas Intermediate, Brent, Dubai, and Maya), which have different physical properties and locations. The results indicate that there is a long-run equilibrium relationship between different benchmarks, regardless of their properties and locations. More importantly, there is asymmetry in the adjustment process that is specifically modeled and implications are discussed.

Green is Good—The Impact of Information Nudges on the Selection of Voluntary Green-Power Plans

Eric Cardella, Bradley T. Ewing, and Ryan B. Williams

Year: 2022
Volume: Volume 43
Number: Number 1
DOI: 10.5547/01956574.43.1.ecar
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A recent trend has been a move toward greater reliance on renewable or “green” energy sources, especially in the residential sector. Using a choice experiment, this paper examines how providing information regarding the efficiency, cost, and environmental impacts of different power-generating sources impact consumers’ stated preferences for selecting voluntary green-power plans. Based on 21,000 plan choices from two different samples totaling over 1,800 respondents, our results indicate that information nudges significantly impact respondents’ choice of plan. Promoting the advantages of the green plan or the disadvantages of the “gray” plan increase green plan selection. The magnitudes of these estimated effects are economically significant being roughly equivalent to a change in the monthly green price premium of $4/month. We also find that promoting the advantages of the green plan is more effective when the green plan premium is relatively small, while highlighting the drawbacks of the gray plan is more effective when the green plan premium is relatively large. Our results suggest that information nudges have the potential to be a plausible, economical, and effective mechanism to increase adoption of voluntary green-power plans.

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