Mismatch between levels of Geography
Hello,
I am producing a report analyzing the impact of shopping center operations at two levels of geography: the suburban town and county where the shopping center is located.
I have input jobs in the following categories:
-329 Retail Stores - General Merchandise
-324 Retail Stores - Food and Beverage
-354 Montary Authorities and depository credit intermediation activities
In my results, the direct jobs come out like this:
my input: 400
Town-level result:370
County-level result: 355
I expected the number of direct jobs to be no lower than my input jobs.
Also, I expected the county-level jobs to be greater than town-level jobs, as the town is wholly within the county.
[b]
Is there any logical explanation for this discrepancy, or must I have made an inputting error?[/b]
The LPPs might explain the mechanics of why my numbers are off:
-town level LPPs average about 93%
-county-level LPPs average about 90%
Any insight would be helpful - thanks!
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Another related issue: The number of output direct jobs in each level of geography are fewer than the number which I inputted (I created this model with employment numbers, rather than sectoral spending). I would expect the direct jobs to be exactly equal to the jobs I inputted. Is there a clear inputting error which would give me this confusing result? -
Hi Eric, Thank you for your post! 1. If all of those jobs are within your study area, LPP needs to be set to 100%. This does not mean that those 3 sectors will purchase all of their inputs locally (local vs. non-local input purchases are already built into the multipliers via each commodity's RPC). By changing the LPP you are saying that only 93% or 94% of your direct impact is only happening in your study region. The remainng % is happening outside of your area and will not be counted. 2. To get the impact on the rest of the county, you need to customize your county Event such that all direct values (Output, Employment, EC, PI) match those from the town model. While the county is certainly larger, it is an average of all towns in the county and thus will have different ratios (Output-per-worker, EC-per-worker, etc.) than any one particular town. Thus, you need to specify all fields in the county Event to match the town Event, such that you are specifying that the direct effects happen in that particular town and thus should have the values from that model. Please let us know if we can be of further assistance.
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