Motivation: Our national source for India, MOSPI, reports the industrial production index (IPI) dataset in not seasonally adjusted (NSA) terms (the fundamental). Under the current basket and index base year, the series are reported at April 2012. The IPI's scope is mining, electricity generation, and manufacturing, and we are interested in the latter.

Response: We have extended the history on the fundamental to April 1981 (31 years) using the corresponding series under three prior base years (the predecessors). Additionally, for international consistency and analytic utility, we have created a seasonally adjusted (SA) counterpart (the supplement).

Properties: The extended and supplemental series of carry a secondary source citation of "Moody's Analytics Calculated" and "Moody's Analytics Adjusted", respectively. Expect the supplement to be recalculated with each update to the fundamental.

Method

Series:

1. IPIMFUM.IIND    = FY 2012=100, reported from 2012m4
2. IPIMF_05UM.IIND = FY 2005=100, 2005m4 to 2017m3
3. IPIMF93UM.IIND  = FY 1994=100, 1994m4 to 2011m6
4. IPIMF80UM.IIND  = FY 1981=100, 1981m4 to 1998m3
5. IPIMFAM.IIND    = Moody's Analytics SA supplement

Process:

1. Extend the active NSA series (A) backwards to 1981 using the predecessors (B), (C) and (D), using scalar multipliers ("linking factors") provided by MOSPI.
2. Seasonally adjust (A) using the U.S. Census Bureau's X-13 ARIMA program to produce (E).

See also

• Data Change: India - IPI - Reclassified and rebased to FY 2012 (Jul 2017)
• New Data: India - IPI - SA (Aug 2012)