In IMPLAN, Total Industry Output (TIO) is the value of production by industry in a calendar year. It can also be described as annual revenues plus net invetory change. The output for the wholesale and retail sectors represents the wholesale or retail margin only; it does not represent revenues (sales).
National Industry Output
TIO is, by necessity, estimated from a number of sources. With the exception of the farm sectors and the commercial fishing sector, for which there is state-level raw data, raw TIO data are only available at the national level. IMPLAN Output data largely come from the same sources as those used by the BEA in developing their Benchmark I-O tables. For most IMPLAN sectors, national output values are taken from the BEA's Industry Output Series and the U.S. Census Bureau's Annual Survey of Manufactures (ASM), both of which are lagged one year. These data are projected based on the change in employment and employee compensation from the previous year to the current data year. "Redefinition" adjustments are also applied to output estimates, in accordance with BEA practices (the construction sectors are an exception, as their output data are already redefined). Some special sectors require information from other surveys and censuses, as described below.
We get state-level output estimates for the farm sectors from the USDA's NASS Value of Production and ERS Cash Receipts data series. These state values are then distributed to the counties by using the ratio of county physical production to state physical production from the latest Census of Agriculture. Please see this document for more details.
Extraction of Natural Gas and Crude Petroleum and Extraction of Natural Gas Liquids
We use a combination of BEA Output Series data, Economic Census data, and physical production and prices data from the U.S. Energy Information Administration (EIA) for petroleum and natural gas. While the EIA data are current and have the necessary sector detail, they are on a commodity basis, whereas the BEA data (which are lagged a year and have less sector detail) are industry-based, which is what IMPLAN needs. Thus, we first use the ratio of “Extraction of natural gas and crude petroleum” output to “Extraction of natural gas liquids” output from the latest Economic Census (which only comes out every 5 years) to split out the lagged BEA value into the two IMPLAN sectors. We then project the two BEA figures using the EIA data.
For new construction, Output = Final Demand (that is, new construction is an investment activity rather than a part of annual operations and thus does not appear in any production function). National output values for the new construction sectors come from BEA NIPA tables 5.4.5-Private Fixed Investment in Structures by Type and 5.9.5. Gross Government Fixed Investment by Type. National output for the maintenance and repair construction sectors are based on the ratio of maintenance and repair to new construction from the BEA's Annual Gross Domestic Product (GDP) by Industry series. These values already contain "redefined" construction activity and thus do not require any redefinition procedures on our part.
The BEA Industry Output series has a limited number of retail sectors. Therefore, we apply the margin-to-sales ratio, calculated using data from the U.S. Census Bureau's Annual Retail Trade Survey which is lagged one year, to current year sales data from the U.S. Census Bureau's monthly time-series data for retail sales to get an estimate of current year retail margin. Note that the output for the wholesale and retail sectors represents the wholesale or retail margin only; it does not represent revenues (sales).
National output for the owner-occupied dwellings sector is set to the Personal Consumption Expenditure (Household Final Demands) value for owner-occupied dwellings from BEA NIPA Table 2.4.5. - Personal Consumption Expenditures by Type of Product.
State-level output for the commercial fishing sector comes from the NOAA Fisheries Office of Science & Technology, Fisheries Statistics DivisionOAA Fisheries Office of Science & Technology, Fisheries Statistics Division.
Sectors 527 through 530 (Used and second-hand goods, Scrap, Rest of world adjustment, and Non-comparable imports, respectively) are commodities only; therefore, their TIO is zero.
Sectors 531-536 are government payroll sectors and whose TIO, by definition, is equal to Value-Added.
State and County Distribution of National TIO
For the farm sectors and the commercial fishing sector, state-level TIO data are available. County data are a function of state output per worker ratios applied to county employment figures. For the remaining sectors, the first estimate of TIO is calculated as Intermediate Expenditures (IE) plus Value-Added (VA), where IE is based on U.S. IE-to-Employment ratios. State TIOs are forced to sum to U.S. TIO, and county TIOs are forced to sum to state TIOs.