I believe IMPLAN is understating the indirect impact of coal mining on the electric power industry (IMPLAN sectors 31, 428, and 431). Wyoming study area data for coal mining employment (IMPLAN sector 21) is 7,546. After running the model for electric power, IMPLAN attributes 32 jobs as indirect employment. That represents ~0.4% of all mining employment for the state. EIA data on coal production (http://www.eia.gov/coal/annual/pdf/table1.pdf) and coal consumption (http://www.eia.gov/coal/annual/pdf/table26.pdf) shows that Wyoming produced 442,522 short tons of coal and the electric power industry consumed 26,102 short tons in Wyoming, amounting to approximately 6%. 6% of the 7,546 mining jobs in Wyoming would be about 450 jobs of indirect employment. Even if the estimate were lower, I cannot imagine how it could only be 32 jobs (0.1 reported as induced). I also observed that in the totals of the consumption table by sector, the electric utility industry as a whole consumed 975,052 of the 1,051,307, or over 92% of the total amount of coal consumed in 2010. There is a similar phenomenon in West Virginia, where IMPLAN study area data shows 22,165.5 jobs in coal mining, but when I run my model on the electric power industry, the result is only 74 indirect mining jobs. Looking at the production and consumption data above, West Virginia produced 135,220 short tons and the electric power industry consumed 32,752. The electric power industry consumed 24% of West Virginia’s production, but IMPLAN reports that it only indirectly employed 0.3%. Can you provide insight into why the numbers are reported low?
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