NSDP Methodology

Nominal NSDP Data

Nominal net state domestic product (NSDP) data was primarily sourced from the Reserve Bank of India (RBI)'s Handbook of Statistics on the Indian Economy, 2022-23. In this report, the RBI only published data from FY 1992-93 onwards, so I obtained FY 1980-81 to FY 1991-92 data from the RBI's Handbook of Statistics on the Indian Economy, 2008-09

A couple other notes are in order. First, for some reason the RBI Indian Economy handbooks did not contain data on Telangana for FY 2004-05 to FY 2011-12, so I procured these numbers from the RBI's Handbook of Statistics on Indian States 2022-23. Second, the RBI did not publish FY 2022-23 data for some states (presumably because these states were late in reporting). When possible, I sought out other sources to obtain figures for these states. For Maharashtra, the NSDP figure was later published and reported by CEIC, and for Kerala the government published NSDP figures in an official report. Gujarat and Goa published GSDP estimates but appear to not have yet released NSDP estimates. Hence, I calculated NSDP estimates under the rough assumption that NSDP grew at the same rate as GSDP. For some other states/UTs, primarily located in the Northeast, I was unable to find GSDP or NSDP estimates.

Third, the Indian government has periodically updated their calculations of NSDP, and so sometimes different estimates of nominal NSDP exist for the same year. In those cases, I averaged the estimates between the two series, unless the new series newly separated out states that had undergone a split (such as Bihar and Jharkhand), in which case I utilized the estimate from the new series for that year. 

Population Data

The Government of India typically conducts censuses every decade and has published statewide figures on population from 1951 to 2011. As of writing, India has not conducted a census since 2011, but the government published population estimates for 2023 using vital statistics and other data in a report. Using census data and these estimates, I linearly interpolated values between census years and between 2011 and 2023. I recognize that there may be superior means of interpolating values or that it may be possible to collect the government's population estimates for every year, but I hope this was a time-efficient means of computing rough estimates.

Price Data

Annual consumer price index data were obtained from the RBI's Database on Indian Economy

Additional Datasets

Nominal NSDP

Population estimates