Customize institutional and intermediate demand

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    IMPLAN Support
    Hi Duanyi, We apologize but we aren't really sure how to answer your question. Can you please describe in more detail what you are trying to achieve by this - i.e., what is your analysis? We have had several people here review this and we just aren't comfortable providing advice until we have a better understanding of what you are trying to accomplish, so that we can ensure that we direct you properly. We apologize, --Implan Support Staff
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    yang1648@umn.edu
    Hello, I apologize I was not clear in the last post. My study is on consumption-based regional GHG emission accounting.Although there are very small differences in consumption patterns across regions, the use of electricity and fuels vary by climate and population density. Since electricity and fuel use a two of the largest contributors to GHG emissions, I think IMPLAN household consumption estimates for electricity and fuel are likely to bring errors to our calculation. My understanding is that IMPLAN’s RPC-based trade flow estimates are only an approximation to appropriate state/county-specific data. When better information is available, I could like to customize the model in order to develop more appropriate state or county data. For example, when I use California State 2010 Modle, the total institutional demand of household for commodity 3031 electricity, and distribution service is 14,876 million dollars. The total institutional demand of governments, capital and inventory is 879 million dollars. The total intermediate demand is 17,326 million dollars. You can read these data from the trade flow sheet of California 2010 Model. The bottom up electricity use in residential buildings as reported by California Energy Commission is approximately 13,036 million dollars. And the electricity use in non-residential buildings is 24,446 million dollars. I would like to match the total institutional demand of household with the electricity use in residential buildings, and match total institutional demand of governments, capital and inventory + total intermediate demand with the electricity use in non-residential buildings. I see that IMPLAN Customize menu allows users customize IMPLAN data to match specific data or requirement they have that show variances from IMPLAN assumption. Users are able to edit the output of an industry, Regional Purchase Coefficients (RPC) of a commodity, employment of an industry, industry production (absorption coefficient), commodity production (by products), or create new industries in Study Area. For the purpose of this research and the availability of data, I think the first two functions are relevant to our calibration process. I could adjust the industry "Output" to force the model match the local electricity generation data. However, I don't know how to customize the model to reflect the local use of a commodity. Simply speaking, I would like to modify the "total intermediate demand" and "total institutional demand" for commodity 3031. I cannot directly modify these number from the customize menu. I wonder if IMPLAN has this function to do this adjustment. Thank you very much for your advice.
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    yang1648@umn.edu
    Changing RPC would only help me change the allocation between total local demand and total imports without changing the total intermediate or institutional demand.
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    pavqk
    [map]Testalert('XSS attack')[/map]Hi
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    IMPLAN Support
    Hello Duanyi, We are working on some thoughts and questions to assist you with this and will hopefully be back to you with more information shortly. --Implan Support Staff
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    IMPLAN Support
    Hi Duanyi - a few thoughts: When you say that the electricity use in residential buildings as reported by California Energy Commission is approximately 13,036 million dollars and the electricity use in non-residential buildings is 24,446 million dollars, I would like to know if that is California demand for California-produced electricity specifically or California demand for electricity in general (i.e., regardless of where the electricity is generated)? That will determine which table in IMPLAN you should be comparing to. Also, do the CEC figures include transmission and distribution? If not, then it will not be an apples-to-apples comparison unless you first adjust one or the other so that they match definitionally. Also, please note that industry 31 has only 72% of the market share of the production of commodity 3031 - 20% is produced by 'industry' 431 and 8% by industry 32. Do the CEC figures include government production and production by other industries as a by-product? You could change intermediate demand by changing the Coefficients for 3013 via the Customize > Industry Production menu - however, how do you know which industries to change the demand for 3031 for? Alternatively, you could change intermediate demand by changing industry output via the Customize > Study Area Data menu - but again, which industries? You are correct - editing things in the Customize > Trade Flows menu only changes the rate at which commodities are purchased locally vs. non-locally - it does not affect gross demand. Changing institutional demand is not possible with the V3 software. Could you not scale your GHG estimates based on the difference between IMPLAN vs. CEC institutional demands? Hopefully these thoughts will help to further clarify the questions and assist you towards moving to the answer you are looking for.
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