Note that "gas" in this context means natural gas, not gasoline
As noted in the methodology below, they are measuring the gas-implied level as the marginal running costs of a combined-cycle gas turbine plant: the price of the natural gas necessary to generate a given amount of electricity, plus the cost of the necessary carbon credits to burn that natural gas. Then they compare that to the actual electricity price
As noted in the methodology below, they are measuring the gas-implied level as the marginal running costs of a combined-cycle gas turbine plant: the price of the natural gas necessary to generate a given amount of electricity, plus the cost of the necessary carbon credits to burn that natural gas. Then they compare that to the actual electricity price