Converting Industry sales to Industry margin

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    IMPLAN Support
    Hello, Margining is necessary to avoid over-counting retail activity impacts. Assigning gross sales to the retail sector would assign both the retail service activity (gross margin) as well as the producer value of the manufacturing. Output per worker is much smaller for retail activity than manufacturing, so without margining the employment impact would be vastly overstated. Also, depending on the region, the manufacturing activity is likely to not even occur locally and would not have any local impact.
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