Issues with model results


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    IMPLAN Support
    Hi Rory, Thanks for all the great information it really assists us in being able to work out what's going on. Based on your description and information, it looks like two things are at play here. The first is Margins. As is common with retail studies there are several categories/Sectors that you are using that are retail Sectors, and it looks from your results like you correctly applied Margins to these purchases. When you apply Margins, the software takes the entered retail value and reduces it to represent on the portion of sales that is kept by the retailer to operate their business, and then leaks the remaining value. A typical retail Margin is between 20 and 30%, but you can see exactly the percentage and the values that are actually being applied to the Multiplier from your initial Industry Sales value in two ways. If you are just interested in the value, you can click on the Preview button in the upper right-hand side of the Setup Activities screen. This will show the values as they are applied to the Multiplier adjusted for both inflation (based on your selected Event Year) and the Margined value. The second method uses this pathway [url=]Event Options> Edit Event Properties>Margins> Edit[/url]. This shows you both the Margin percentage and the Margined value. This occurs because the Purchaser price (what you and I pay) is much larger than the retailer's markup, the only part of the sale that retailer actually keeps and uses for operations. The remaining dollars entered into Industry Sales are leaked from the Model, because we don't know the basket of goods purchased. Without knowing what was purchased, we can't attribute the purchases of the actual items to any particular producing Sector, determine whether or not it was produced locally (which is typically unlikely) or what portion of its wholesale or transport costs may be local, so we have to assume that all production or the purchased product, transport, and wholesale are imports. The issue you are seeing in regards to different results in different years is likely associated to the deflators. If you are summing results, you will want to choose a single Dollar Year for View to sum them in, but if you are viewing and reporting them relative to the year of the expenditures you will want to be sure the Dollar Year for View field matches your Event Year for the Event. You can check your sum of entered values at the bottom of the Event screen in the "Sum of Event Values". This sum does not include any adjustments for Margins of deflators so it will help you ensure that you have entered the desired value into both Activities.
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