Description:
Annual retail gas prices since 1950, split by Leaded and Unleaded and adjusted for inflation.
Data:
http://www.eia.gov/totalenergy/data/annual/index.cfm
Analysis:
Gas prices have spiked sharply twice since 1949. Even though $3 per gallon sounds like a lot, when adjusted for inflation, it isn't that bad when compared with some prior years. Both trend lines indicate that gas is getting cheaper over time; however, due to the wildly fluctuating prices of unleaded since just before 1980, the 'least squares' method of determining the trend line is problematic.
Questions:
- Why were the prices for leaded gasoline more stable than unleaded?
- Are we due for a major downward trend in prices?
- Is the amount of fuel consumption related to the retail price?
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