Analysis for an area with many counties

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    jenny
    It really comes down to who your audience is and exactly what you are trying to show, but we typically recommend MRIO where possible. This forum discussion and the links within it should be helpful: http://implan.com/V4/index.php?option=com_kunena&func=view&catid=84&id=11493&Itemid=35#11498 Note that tradeflow data (and thus MRIO) is not currently available at the zip-code level. This forum discussion suggests a proxy for MRIO when working with zip-code data: http://implan.com/v4/index.php?option=com_kunena&func=view&catid=85&id=10097&limit=6&limitstart=12&Itemid=35
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    daramirez3
    I think I will use MRIO. I have another question, suppose, I have activity occurring in two counties that are not adjacent but very close, and I know with certainty the amount that occurs in each county. Should I run two different MRIOs, focusing on the direct effects of each different county? The activity occurs in these counties, but there are several (more than 3) counties that are adjacent to these areas.
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    jenny
    That's exactly right - you will run 2 MRIOs and then sum the impacts. Note: If the direct impact in one county is primary production (e.g., grain farming) and the direct impact in the other county is processing of that primary product (e.g., ethanol plant), then you would be double-counting the impact to the grain sector using this method. If this is not the case, then your approach is fine.
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    daramirez3
    The more counties I add to a region in MRIO, the lower my impact results. is there a reason for this?
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    DougO
    The impacts of the primary county of impact should only go up with more counties being added to the linked region or the more regions you link. If you are adding counties to the primary impact region, then it may be that the original county had the lowest output per worker (highest direct employment) and/or highest earnings per worker and the more counties you add the average output per workers go up. If this is the case, does the direct employment go down? Are the indirect and induced effects going up or does the phenomema affect all categories of impacts and indicators (employment, output, value added)?
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