I would like to run a contribution analysis (of agriculture) with rice milling (NAICS: 311212) as a separate industry, rather than included in IMPLAN sector 43 (Flour milling and malt manufacturing, NAICS 31121). In the 2004 data set, it was still considered a separate IMPLAN sector. I have most of the data I think I need to create an industry spending pattern for rice milling and remove the rice component from sector 43, but the information at "Building and Using an Industry Spending Pattern" (https://implan.com/V4/index.php?option=com_multicategories&view=article&id=615:615&Itemid=14) seems to have a shortfall for my purposes: no estimation of direct effects. What I would really like to do is create a new industry, e.g., sector 441 "Rice Milling" (not replace study area data for a sector or bring in an already-defined industry that is not in the study area). I have not been able to find out if this is possible, or if this is the best way to go about separating out rice milling. I feel that the situation is further complicated if I use the building an industry spending pattern method: I still have other activities that I must analyze in a separate scenario for the contribution analysis that I would only want to run using the updated rice milling and flour milling industries. I feel like surely someone else has wanted to create a totally new industry like this, so I'm hoping the answer is something simple I am missing in my research. Thanks in advance!
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