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  1. Home
  2. Help
  3. Frequently Asked Questions

Frequently Asked Questions

  • Is the I-O table on an establishment or a firm basis?

  • How can I convert data from producers' to purchasers' prices?

  • Where can I find trade and transportation margin data?

  • What are requirement tables, and how are they formed?

  • Why are no government purchases shown as intermediate inputs?

  • Where can I find definitions of commonly used I-O terms?

  • Where can I find descriptions and definitions of different portions of the I-O table?

  • What do negative numbers in the I-O tables mean?

  • What is the difference between direct and indirect requirements in the I-O tables?

  • How do I interpret the symbols (for example, an *) in the Benchmark Tables?

  • Where should I look for general explanatory information about the I-O tables?

  • Is there a table that lists all the concordance codes (SIC, I-O, and NAICS)?

  • How can I tell which industries belong to which classification?

  • What is the difference between 2, 3, 4, 5, and 6-digit NAICS codes?

  • Where can I get the 1997 Capital Flow Table?

  • How can I access archived Benchmark I-O tables?

  • When analyzing regional performance, should I use current or real (chained-dollar) GDP by state?

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