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Edited on Sat Aug-21-04 01:36 AM by happyslug
In economics you have the concept of substitution, that is when a particular item's price goes up, demand not only falls but switches to substitutes. For example if the Prices of Apples goes up, some people switch to Oranges (This both reduces the demand for Apples, keeping the price lower than if no substitution had occurred, but also increased the price of Oranges do to the increase demand caused by the Substitution).
Transferred this concept to Oil, Natural Gas, Coal and even electricity, to a degree, can an be substituted for each other (and for oil). For example people may decide to drive a Natural Gas powered car (or even an Electric car) if the price of oil goes up to much.
Remember while "base-line" electricity tends to be Coal or Nuclear powered, "Peak demand" is generally provided by Natural Gas or Hydroelectric plants. This is because Natural Gas and Hydro Electric Plants can be quickly turned on and off as needed, Coal and Nuclear can takes hours or even days to increase or decrease power production. Coal, Nuclear and Hydroelectric are your cheapest form of Electric Generation. Natural Gas is the cheapest type of electric plant to build in addition to quickest to start up and shut down (But more expensive to operate than other forms of electric generation).
Thus if you decide to go to an electric Car, the electricity may be produced by Natural Gas. Thus your drop in demand for Oil is being transferred to increase demand for natural gas (or may coal or Nuclear power).
Natural Gas can also be used to directly in a gasoline engine (Installation of a heavy duty tank to hold the Compressed Natural Gas has to done plus some minor changes to the engine, but once done the car is set to go). Many cities have Natural Gas powered Buses, thus increase use of Mass transit, while reducing the demand for oil, may increase the demand for Natural Gas.
Furthermore people may stay home increasing the cost of heating their home with natural gas instead of going out in their oil powered car.
And one more fact, if home heating oil goes up people may switch to Natural Gas, another area where these two fuels can be substituted for each other.
My point here is Natural Gas and Oil can to a degree be substituted for each other and were in the 1970s (and will be again). Thus any price increase in one will also lead to an increase in the other based on the concept of Substitution.
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