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Abstract
Social accounting matrix (SAM) models have become standard methods to provide
quantitative economic impact evaluation. SAM models and methods have a wide body of literature
and dates back several decades. In recent years there has been a growing interest in using
interregional and multiregional SAM models. IMPLAN provides data necessary, in a convenient
format, to construct single-region SAM models. Procedures of the use of IMPLAN data
in concert with BEA’s “journey-to-work” commuting flows and data from the Commodity
Flow Survey (CFS) collected by the Census Bureau and compiled by the Bureau of Transportation
Statistics to construct state-level multiregional SAM models has been demonstrated. However,
little research exists concerning the creation of multiregional SAM models at geographic
scales lower than states, especially the roll that interregional trade plays in the accuracy of these
models. This paper evaluates sensitivity of multiregional SAM multipliers to the procedures
used to estimate interregional trade flows.