Problem with Induced Effects in some Linked Models

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Tepa Banda

• June 15, 2011 23:26

The Situation: I've set up 14 regional models (each model is an aggregation of several counties) covering the entire State of California. For each regional model, I've linked the other 13 models for MRIO analysis. (I have 14 separate folders, with each folder containing all the 14 models, so each model file is only used once in an MRIO model). The Problem: When I run an MRIO (say for San Francisco Bay Area as the primary region linked to the other 13 models) - I get normal results in 9 of the linked models but inconsistent results in 4 regions, i.e. ridiculously high numbers for induced effects, in millions of jobs for approx $300,000 construction spending. See attachment for a screenshot of results in one of the affected regions. I've run this several times with different regional models as Primary but I get the same inconsistent results in the same regional models. I've re-created these 4 regional models and replaced them but I'm still getting the same results. FYI, The 4 regional models contain the following counties: Region 1 (San Luis Obispo, Santa Barbara, Ventura), Region 2 (Inyo, Mono); Region 3 (Riverside, San Bernardino); and Region 4 (Los Angeles). I'll really appreciate your speedy response. Thanks.

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  Doug Olson

  • June 16, 2011 00:10

  Using 2009 data I created a Marin & San Francisco model and linked it with Los Angeles (one of your 4 problem regions). The results looked reasonable. First, I want to be sure you have updated the software (My current version is 3.0.11.2 - under Help>About). If the update doesn't fix it I will need to create the 14 regions to try it. Send the list of counties (e-mail to info@implan.com) for the 14 regions. Thanks

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  Tepa Banda

  • June 16, 2011 02:23

  Thanks, I just sent an email with the list of counties for each of the 14 regions. The subject line is "MRIO analysis - 14 California regions". By the way, I also have the same version of IMPLAN 3.0.11.2

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  Doug Olson

  • June 16, 2011 02:25

  Got the e-mail, will give it a shot. I suspect there is a null value in some of the commuting data, but that is a shot in the dark. I will let you know when we figure it out.

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  Doug Olson

  • June 16, 2011 21:05

  We can not get the error to re-occur. I'm checking with the programmer to see if re-downloading the data files will refresh your commuting data binaries. I think you may have a corrupt file. If you don't want to wait, you can call the office and they can update the commuting data on your appliance right away.

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  Doug Olson

  • June 16, 2011 21:17

  You will need to call the office (651-439-4421) to have a tech update the CA commuting data for you.

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  Tepa Banda

  • June 16, 2011 22:33

  I called the office and a tech updated the data on my device. I'm re-constructing the models and will let you know after I re-run the MRIO analysis. Thanks again.

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  Doug Olson

  • June 16, 2011 22:37

  One of the programmers is looking at the same regions to make sure I didn't screw up the test, let us know how it goes.

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  Tepa Banda

  • June 16, 2011 22:51

  I've done 1 run using San Diego-Imperial region as the primary with all 13 linked regional models and the results look good (normal).

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