why same dataset produces different numbers


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    Both V2 and V3 use the same econometric equations to calculate trade flows. Since you are apparently aggregating the model, I would assume there is a difference between the two in weighting the parameters of the RPC equation. The parameters of the RPC equation are the same prior to 1997, only the variables of the region data would be different year to year. We have not "smoothed" the data.
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