When completing a Multi-Industry Contribution Analysis on 8 industries, we would also like to look at each of those 8 industries separately in further detail. Are there any issues with creating a new activity for each of the 8 industries after making the adjustments on the model following the multi-industry methodology? Doing this yields different results (lower in our case) than conducting a single industry contribution analysis as shown at the link below. Adopting the multi-industry approach for the 8 individual industries gets much closer (<1%) than using the single industry approach and comparing to the multi-industry approach for the 8 industries together. We want to be sure that the sum of the parts (8 industries) does not exceed the total aggregated industries. Thanks! Michelle
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