I just purchased the 2011 data for Maricopa County (AZ) and I am having trouble with the model. I have set up an industry change for sector 284. Employment is 70 with an annual payroll of $4,697,100. No sales data is available. The problem is that I get a negative value of ($11,708,372) for Proprietor Income. When I check the income multipliers I find that direct is -0.116374; indirect is 0.14711; and induced is 0.015054. In fact sectors 287, 289, 288, 286, 175, 284, 293 and 285 all have a negative direct income multipliers. Just to double check my sanity, I ran the same model using the 2010 data. I don't have the same problems. The direct income multiplier for this sector is 0.176201 and my results don't have any negative numbers. In fact, there are no negative direct income multipliers in the 2010 data set. Questions - Is there something wrong with the data set? If not, why is there a negative value for the direct income multipliers, and how can this multiplier change so dramatically in one year? Thank you.
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