I'm running models for the electricity and natural gas distribution industries for a group of counties and also at the state level. All else equal, the electricity distribution industry seems to have much larger effects than does the gas industry, so I've been looking at the multipliers (which display this pattern) and trying to figure out what's driving these differences. And while state-level employment effects are larger than those for the smaller region, the other types of effects are generally smaller and this coincides with the multipliers I pulled from IMPLAN. Can you point me to where I might find information on how direct, indirect, and induced multipliers are derived? What sorts of inputs (output? labor intensity? others?) go into the calculations? I'd be particularly interested in any insight into what drives differences across industries and across regions. Thank you!
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