The Levene’s test results reveal that there is a statistically significant difference in the producers’ risk between trade in ACL and ACR. The conditions offered in the ACR counteract the uncertainties in price and amount of contracted energy, which makes the producer returns variance lower than in ACL. Moreover, the ACL can expose the producer to contracts with uncertain revenues, contributing to the significant difference between the producer’s risk in the analyzed environments. Although there are different periodicities for contracts in ACL, this study considered the one-year contract over the 20 years of operation of the wind farm.
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