Skip to Content Release dates | Historical data | Data Download | Documentation Current Monthly Release Other formats: ASCII | PDF (144 KB) Supplemental Monthly Release Other formats: ASCII | PDF (144 KB) Annual Revision Release Other formats: ASCII | PDF (150 KB) Relative Importance Weights Documentation: These files include descriptions and the codes that represent the industrial production series in Tables 1 and 2.
The relative importance weights provided in the data file allow the user to compute special aggregates of industrial production that are not published in the G.17 release. These weights should be used to combine growth rates of component IP series to obtain a growth rate for a special aggregate. If industry C is industries A and B combined, the growth of IP for C can be approximately computed using the following formula, where IP_A[t] is the level of IP for industry A in month t and RIW_A[t-1] is the relative importance weight of industry A in month t-1. IP_C[t]/IP_C[t-1] = (RIW_A[t-1]*IP_A[t]/IP_A[t-1] + RIW_B[t-1]*IP_B[t]/IP_B[t-1])/(RIW_A[t-1] + RIW_B[t-1]) To exclude industry B from IP aggregate A, one would subtract instead of adding:
IP_C[t]/IP_C[t-1] = (RIW_A[t-1]*IP_A[t]/IP_A[t-1] - RIW_B[t-1]*IP_B[t]/IP_B[t-1])/(RIW_A[t-1] - RIW_B[t-1])
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