I don't quite fully understand the concept of setting RPCs to zero to ensure a sector's economic contribution to a region. If industry's A-Z were the only industries in a region and if the desired sector consisted of industry's A-G, how would that sector's contribution to the region be assured by setting the RPC of each underlying industry's chief commodity to zero? By "chief" I mean the commodity which has the largest share of production in its industry as shown in the "Industry Production" table in IMPLAN. Furthermore, how would setting RPCs to zero eliminate double counting? What is double counting?
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