I am just beginning to familiarize myself with the IMPLAN system, so I apologize if this has been answered somewhere else but I just missed it. I am looking for guidance on selecting my study area. I want to determine the economic impact of an airport on the local economy. It is easy to see that much of the direct impact would occur in one place, at the airport itself, with the employees hired to run it (and thus limited to one county). However, the impact of the airport goes beyond that by serving as a gateway for people to access the metropolitan area (several counties) as a whole, etc. My question is, how does IMPLAN adjust for this? Am I overstating the impact by including multiple counties, or conversely understating the impact if I limited my study to the county the airport is located in? Thanks in advance for your assistance.
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