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City level analysis using county data

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e_vilchis
Greetings! I am working for a client in the Midwest that wants an economic impact analysis (jobs and wages only) of a retail project at the city and county level. However, they have a limited budget so they can only buy the County level IMPLAN model. I was wondering if we could do the analysis at the County level and, since we know that the City accounts for 90% of all jobs and 80% of all businesses in the County, then just discount the estimate of indirect and induce impacts at the county-level by a 10% to 20% to estimate the impacts at the city level? Thank you for your assistance.
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    IMPLAN Support
    Hello Ernesto, You could do this, since you are stating that most of the employees reside and thus purchase their services from within the boundaries of the city, but we would strongly recommend stating your methodology in the report. This is certainly at best a rough estimation of the impacts as it cannot take into account the actual variances in RPC between the county and the city and in turn the RPC's of successive rounds of local purchasing, which will likely decrease more quickly at the city level, than at the county. You may also want to consider running a couple of variants to create a range of potential city impacts. Please let us know if you have any additional questions.
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