Economic contribution studies are full of challenging theoretical and methodological is-sues. The economic export base method for conducting contribution analysis presented ad-dresses the challenge of double counting while increasing an analyst’s insight into a regional economy. Using data from regional social accounts, an economic export base model is pre-sented that simultaneously separates export base contributions for each sector as a row of col-umn vector sums. The export base measures of economic activity by sector serve as an inter-nally consistent and externally correspondent measure of any given sector’s ex post regional economic contribution. The sum total of the export base and original “gross” measures of economic activity across sectors are equal for the economy but are almost always unequal by sector. These base measures are also valuable by themselves and as inputs into further anal-yses into questions regarding competitive advantage, diversity, resilience, dependency, typol-ogy, and growth.


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