We recently purchased county level 2013 data for the US. In running some sub-regions (within Tennessee), state (Tennessee), and a US model I noticed that value added was negative for all these models for sector 2 – Grain Farming. Further analysis indicates that the culprit was a large negative value for the value added component for tax on production and imports ($5.3 billion). Further analysis indicates that this is the second largest negative value for the entire US economy (sector 526 is the largest negative value at $10.5 billion). Is this correct? And, if so, could you please explain?
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