What is a shrid? Are these population census identifiers?
- Please read the SHRUG codebook, which
contains all this information and more.
How do I link the data to NSS / ASI?
- The data can be linked to the ASI/NSS through
the district identifiers provided in
shrug_pc91_district_key.dta etc.. We have not
done this yet and cannot tell you which district
identifiers were used by the NSS. If you do create
district keys for the SHRUG, please post them so
others do not need to duplicate your work.
- Some SHRUG villages and towns cross district
boundaries. In the population census, these
villages/towns often have identical codes and
names, but are have parts assigned to different
districts. We have collapsed/dissolved these into
single location units in order to match them
across multiple datasets.
- Please do not attempt to link SHRUG villages
to NSS villages, as this violates the spirit under
which NSS releases location identifiers and may
jeopardize the quality of information in future
Are there maps / geocodes for SHRUG locations?
- We don’t have a license to release maps at
because we don’t know of any sufficiently high
quality open assembly maps or 2011 village
maps. However, you can get shapefiles for SHRUG by
linking the data to the open village maps offered
by NASA-SEDAC at Columbia University. You can
merge villages to these using the 2001 state,
district, subdistrict, and village codes in
shrug_pc01r_key.dta, and towns using state and
town codes in shrug_pc01u_key.dta. Keep in mind
that shrids consist of multiple towns and
villages, so you will need to dissolve this
shapefile to the shrid unit to make it consistent
Is there a village/town key for assembly constituencies?
Are there data for parliamentary constituencies?
Where is the more recent data?
- SHRUG is largely based on administrative data released by the Indian government. The government takes three to five years to release these data, so you cannot use SHRUG to learn about very recent events. We are planning to release a data source with same-year and real-time economic data in the future.
Can you please drop everything and add my favorite data field in the census to the SHRUG?
- We are adding data as quickly as we can. Some data fields that are slated for the next round of the SHRUG include air pollution, precipitation, education levels, disabilities, and consumption in cities.
How should I deal with outliers?
- The raw population and economic census data
include a large number of outliers. We have left
these in the SHRUG because it is difficult to tell
which are accurate and which are
errors. Nevertheless, users should exercise
caution and either exclude outliers or verify that
results are robust to their exclusion. As a matter
of course, we typically drop villages with
population under 100 in 2011, as well as villages
with extremely large population and towns with
extremely small populations. We also typically
drop villages with employment counts far above
population; while some of these may be legitimate
factory towns, it is difficult to distinguish them
in general from erroneous data entry.
What are the units for consumption?
- Consumption is reported as village/town per
capita consumption in 2012 Rupees over the last
year. The consumption data are small area
estimates of consumption based on the set of
assets and income reported in the SECC.
Why is there no state code for Telangana?
- Each round of the SHRUG is based on the most recent
population census, which was undertaken in 2011
before Telangana was a separate entity. Villages
in Telangana will thus be coded as being in Andhra
Pradesh. The last major administrative dataset in
SHRUG is the 2013 Economic Census, which predates
Telangana. Some of the remote sensing data is more
recent, and corresponds to pre-Telangana polygons.
Why are some states missing from the
constituency data series?
- The 2007 constituency maps are all slightly
misaligned, which causes particular problems in
states with very small constituencies (Goa,
Sikkim, Tripura) and states with very large
villages (Kerala). If we can find higher
quality constituency maps for the 3rd
delimitation, we will add these states to a future
version of the SHRUG.
Something is broken, unclear, or could be improved.
- If you have any questions for us, come across
issues with the data, or want to discuss using
SHRUG for research, please visit the SHRUG-India