Imports in IMPLAN question
I have a question about imports. We are showing imports located in the Final Demand section rather than in the Value Added section (see link showing basic input-output table with imports in Value Added: http://edis.ifas.ufl.edu/fe168). My understanding is that imports are an input (i.e. industry, govt, and consumers purchase them), so why do they appear only in the Final Demand section? Second, why are the numbers so far off from actual CA import/exports in 2009?
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Which IMPLAN table are you looking at? The IxC SAM (Explore > Social Accounts > IxC Social Accounting Matrix tab) for my CA 2009 model shows imports by industries and final demand. Regarding comparison to state-level Census data: If your state has a port, customs district, or importer, the importation to the region does not necessarily imply local use. Census import data only reflects either customs port of entry data, which does not specify the producer or final consumer, or importer location, which does not specify whether the importer is a final consumer or a wholesaler/broker who will in turn move the goods on. We use the Census data at the U.S. level, where these details don't matter (e.g., if the U.S. exports it, then the producer is located in the U.S.). We then use the same foreign export/import rates for all sub-national regions. -
I was looking at the Model Overview which looked like this: Value Added Employee Compensation $998,029,585,549 Proprietor Income $161,842,686,632 Other Property Type Income $579,281,430,887 Indirect Business Taxes $135,408,480,870 Total Value Added $1,874,562,183,938 Final Demand Households 1,307,940,218,806 State/Local Government $206,661,524,056 Federal Government $111,968,669,617 Capital $231,062,678,966 Exports $825,068,223,403 Imports -$742,574,552,059 Institutional Sales -$65,564,562,104 Total Final Demand: $1,874,562,200,685 I'll ask my colleague to check the Social Accounting Matrix tab to see imports by industries. Thanks for clearing up the question about the census data. -
The Gross Regional Product information in the Model Overvies simply shows the two ways you can view GRP: 1. From the value added perspective (Gross Regional Income): the value-added generated as local industries produce their output 2. From the final demand perspective (Gross Regional Product): the value of local industry output sold to final consumers, which is calculated as all demands by local households, local government, local capital, and non-local final consumers (export), minus the local demand that is satisfied by imports and by institutional sales. In regards to the article in the link you provided, that table is just an I-O table (inter-industry transactions only), whereas IMPLAN provides a Social Accounts Matrix, which includes the I-O table PLUS the transactions between industries and institutions. I think the IxC SAM (Explore > Social Accounts > IxC Social Accounting Matrix tab) will give you what you're looking for.
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