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Originally Posted by lars-ss
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It’s indisputable that the price of gas always seems to go up during the summer driving season and drops right after Labor Day. And let’s see, Labor Day was a week ago last Monday — right about the time gas prices started dropping.
Winter blend gas is cheaper to refine also. . . .
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Since we have retail gas prices going back to the 1990s, there are enough samples, not just the current and last year, to plot the seasonal values, right?
http://tonto.eia.doe.gov/dnav/pet/pe...dcus_nus_w.htm
I'll post the plot later but general observations:
1) January has wide spread and a lower starting price
2) February shows same spread and some price decrease
3) March show less spread little higher price
4) April shows smallest spread and nearly 5% higher price
5) May shows increasing spread and higher price
6) June shows increasing spread and higher price
7) July shows less spread and slight decreased price
8) August show same spread and slightly higher price
9) September shows slightly higher spread about the same price
10) October shows same spread and clustering lower price
11) November shows increasing spread and no change
12) December shows same spread and lower prices
There are roughly the same number of Democratic as Republican points in the graph and nothing really stands out. There are some higher, local peaks of two month durations with Democratic blue but also one dramatic Democratic drop. There are also two sustained Republican red rises. But again, nothing that clearly shows one administration versus the other as having a problem. There is only a 2% difference in the annual average increase in the cost of gas:
MM Avg(R) Avg(D)
01 92.58% 94.89%
02 92.71% 95.00%
03 95.10% 96.53%
04 100.12% 99.23%
05 103.40% 101.70%
06 103.27% 103.21%
07 102.39% 102.39%
08 104.18% 101.87%
09 106.19% 102.51%
11 103.64% 102.04%
12 101.83% 101.51%
IMHO, there is no smoking gun in the data I've been looking at and I'm a proud, partisan Democrat. Looks like 'the invisible hand' at work.
Bob Wilson
ps. That 2% average increase over the 16 years of data is probably just bad luck. <GRINS>