Census 2011 or the 15th National Census, a gigantic exercise to capture the socio-economic and cultural profile of India’s population, began on April 1, 2010. India undertakes this exercise every 10 years through the Office of the Registrar General and Census Commissioner in the Ministry of Home Affairs. The census documents details of a billion plus population on diverse subjects such as demography, literacy, fertility and mortality and provides primary data at village, town and ward level. The first census ever to take place in India was in 1872 and the last one was held in 2001. The Census of India Act, 1948 lays down the rules and regulations pertaining to conduct of a census. The Act makes it obligatory for the public to answer all the questions faithfully while guaranteeing the confidentiality of the information. The last census was held in 2001, which revealed that India’s population was about 1.03 billion. Statistical data related to literacy rate, sex-ratio, urban-rural distribution, religious composition, SC/ST population and so on were captured by Census 2001. Features of Census 2011 Census process: India uses the canvasser method for collecting census data. Under this method, the canvasser approaches every household and records the answer on the schedules himself after ascertaining the particulars from the head of the household or other knowledgeable persons in the household. The full detail of the methodology is available here. National Population Register (NPR): It would be a register or database of residents of the country. The government states that such a database would facilitate better targeting of the benefits and services under government schemes and programmes; improve planning and help strengthen the security of the country. The register is being created under the provisions of the Citizenship Act and Rules. NPR process: Basic details such as name, date of birth and sex shall be gathered by visiting each household of a resident of the country. A database shall be created with addition of biometric information such as photograph, 10 fingerprints and probably Iris information for all persons aged 15 years and above. The list shall be sent to the Unique Identity Authority of India (UIDAI) for de-duplication and issue of UID Numbers. The cleaned database along with the UID Number would form the National Population Register. There was a controversy over whether Census 2011 should capture caste data. Since India last collected caste data in 1931, proponents argued that up-to-date, reliable caste data was essential to target welfare schemes towards various backward castes. Opponents however contended that this would perpetuate the caste system. The government finally decided not to include caste as one of the parameters in the 2011 census. Table 1: Schedule of Census 2011
| Schedule | State/UT |
| April 1 | New Delhi (NDMC area), West Bengal, Assam, Andaman & Nicobar Islands, Goa, Meghalaya, Bihar, Jharkhand |
| April 7 | Kerala, Lakshadweep, Orissa, Himachal Pradesh, Sikkim |
| April 15 | Karnataka, Arunachal Pradesh, Chandigarh |
| April 21 | Gujarat, Dadra & Nagar Haveli, Daman & Diu |
| April 26 | Tripura, Andhra Pradesh |
| May 1 | Haryana, Chhattisgarh, Delhi, Punjab, Uttaranchal, Maharashtra |
| May 7 | Madhya Pradesh |
| May 15 | J & K, Manipur, Mizoram, Rajasthan, Uttar Pradesh |
| June 1 | Tamil Nadu, Puducherry, Nagaland |
Last week, the Planning Commission filed an affidavit in the Supreme Court updating the official poverty line to Rs 965 per month in urban areas and Rs 781 in rural areas. This works out to Rs 32 and and Rs 26 per day, respectively. The perceived inadequacy of these figures has led to widespread discussion and criticism in the media. In light of the controversy, it may be worth looking at where the numbers come from in the first place. Two Measures of the BPL Population The official poverty line is determined by the Planning Commission, on the basis of data provided by the National Sample Survey Organisation (NSSO). NSSO data is based on a survey of consumer expenditure which takes place every five years. The most recent Planning Commission poverty estimates are for the year 2004-05. In addition to Planning Commission efforts to determine the poverty line, the Ministry of Rural Development has conducted a BPL Census in 1992, 1997, 2002, and 2011 to identify poor households. The BPL Census is used to target families for assistance through various schemes of the central government. The 2011 BPL Census is being conducted along with a caste census, and is dubbed the Socio-Economic & Caste Census (SECC) 2011. Details on the methodology of SECC 2011 are available in this short Ministry of Rural Development circular. Planning Commission Methodology Rural and urban poverty lines were first defined in 1973-74 in terms of Per Capita Total Expenditure (PCTE). Consumption is measured in terms of a collection of goods and services known as reference Poverty Line Baskets (PLB). These PLB were determined separately for urban and rural areas and based on a per-day calorie intake of 2400 (rural) and 2100 (urban), each containing items such as food, clothing, fuel, rent, conveyance and entertainment, among others. The official poverty line is the national average expenditure per person incurred to obtain the goods in the PLB. Since 1973-74, prices for goods in the PLB have been periodically adjusted over time and across states to deduce the official poverty line. Uniform Reference Period (URP) vs Mixed Reference Period (MRP) Until 1993-94, consumption information collected by the NSSO was based on the Uniform Reference Period (URP), which measured consumption across a 30-day recall period. That is, survey respondents were asked about their consumption in the previous 30 days. From 1999-2000 onwards, the NSSO switched to a method known as the Mixed Reference Period (MRP). The MRP measures consumption of five low-frequency items (clothing, footwear, durables, education and institutional health expenditure) over the previous year, and all other items over the previous 30 days. That is to say, for the five items, survey respondents are asked about consumption in the previous one year. For the remaining items, they are asked about consumption in the previous 30 days. Tendulkar Committee Report In 2009, the Tendulkar Committee Report suggested several changes to the way poverty is measured. First, it recommended a shift away from basing the PLB in caloric intake and towards target nutritional outcomes instead. Second, it recommended that a uniform PLB be used for both rural and urban areas. In addition, it recommended a change in the way prices are adjusted, and called for an explicit provision in the PLB to account for private expenditure in health and education. For these reasons, the Tendulkar estimate of poverty for the years 1993-94 and 2004-05 is higher than the official estimate, regardless of whether one looks at URP or MRP figures. For example, while the official 1993-94 All-India poverty figure is 36% (URP), applying the Tendulkar methodology yields a rate of 45.3%. Similarly, the official 2004-05 poverty rate is 21.8% (MRP) or 27.5% (URP), while applying the the Tendulkar methodology brings the number to 37.2%. A Planning Commission table of poverty rates by state comparing the two methodologies by is available here.
