Dear IMPLAN, based on discussions with Bob,I'm thinking of purchasing your "national level only" data base, and want to make sure I'm getting what I'll need.. My doctoral dissertation topic involves establishing the importance of the US Mfg sector[broadly speaking] to the health of the US economy. I'm familiar with Leontiefs inverse, decomposition methodology, coefficients, etc. In your support data sources one of the categories I THINK refers to the decomposition coefficients. WHERE do you get that decomposition information? In other words if you say $1000 of increase in output in the computer hardware industry requires $10 of agriculture, $20 of services, $50 of steel mfg, etc, WHERE do those $ numbers come from. The raw data? Do you create them?: A government data source? How current are these coefficients? 2. As part of my research I'm hoping to be able to show that the size and/or growth rate of the US manufacturing sector, in aggregate, is a key requirement for the growth of the US economy.[as opposed to growth in the technology, or health services industries]. Would I have to input increases in EVERY NAICS industry to see the overall GDP impact, or can I somehow aggregate them into one input of increased manufacturing activity? Thanks, jeff
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