IMPLAN's weakest link: Production functions or regional purchase coefficients?

William F Lazarus, Diego E. Platas, George W. Morse

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Regional purchase coefficients (RPCs) are often seen as the weakest link in input-output modeling systems such as IMPLAN. In IMPLAN the RPCs are estimated either by the supply-demand pool (SDP) method, which ignores cross-hauling, or by econometric methods, based on 1977 data. Yet, how much difference do the RPCs make relative to the production functions, which reflect national and not local conditions? This study uses a case study of the swine industry in Martin County, Minnesota to explore this question. While this is a limited test, the results suggest that the production function changes are much more important than the changes due to regional purchase coefficients.

Original languageEnglish (US)
JournalJournal of Regional Analysis and Policy
Issue number1
StatePublished - Dec 1 2002


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