What methodological differences explain varying poverty estimates by Lakdawala, Tendulkar, Rangarajan committees?

Of course. This is an excellent and frequently asked question in UPSC Mains (GS-III) and Prelims. Understanding the evolution of poverty measurement is crucial for analysing social development policies. Let's break down the methodological differences between these key committees.

Opening

The estimation of poverty in India has been a subject of intense debate, primarily due to the different methodologies adopted by various expert groups over time. The Lakdawala, Tendulkar, and Rangarajan committees represent three distinct phases in this evolution, each refining the approach to better capture the multi-dimensional nature of poverty. Their varying estimates are not arbitrary but are a direct consequence of fundamental shifts in their underlying assumptions, from a basic calorie-intake model to a more comprehensive view of well-being.

Comparison Table: Lakdawala vs. Tendulkar vs. Rangarajan Committees

Key Differences Explained

1. The Anchor of the Poverty Line:

   • Lakdawala: The foundation was strictly the minimum calorie requirement. The poverty line was the expenditure needed to consume 2400 kcal (rural) and 2100 kcal (urban). Everything else was secondary.
   • Tendulkar: This committee marked a paradigm shift. It argued that poverty is not just about food. It used the existing urban poverty basket from 2004-05, which implicitly included private spending on health and education, and made this the new national standard. It moved away from a direct link to calorie intake for estimation, even though the nutritional outcome was a consideration.
   • Rangarajan: This was a middle path. It went back to specifying norms, but not just for calories. It defined normative levels for adequate nutrition (calories, protein, fats) and minimum consumption of non-food items like clothing, housing, and transport. This made its poverty line more comprehensive and, consequently, higher.

2. Price and Regional Adjustments:

   • Lakdawala: Used two different price indices (CPI-AL and CPI-IW) to adjust state-specific poverty lines over time. This was criticised for not capturing the actual consumption patterns of the poor.
   • Tendulkar: Used a single, uniform all-India urban poverty basket and adjusted it for price differentials across states and between rural/urban areas. This aimed for consistency but was criticised for applying an urban standard to rural India.
   • Rangarajan: Created separate poverty baskets for rural and urban India, acknowledging their different consumption patterns and price environments. It used more sophisticated price indices (Fisher Index) for adjustments.

3. Data Collection Methodology:

   • The Rangarajan committee was the first to officially use the Modified Mixed Recall Period (MMRP) data from the NSSO consumption expenditure surveys. Previous committees used the Uniform Recall Period (URP) or Mixed Recall Period (MRP). MMRP is considered more accurate as it uses a 7-day recall for perishable items, a 30-day recall for others like fuel, and a 365-day recall for low-frequency non-food items (clothing, durables). This methodological change in data capture itself leads to different poverty estimates.

UPSC Angle

For UPSC, examiners are not just looking for a rote memorisation of the poverty percentages. They want to assess your understanding of the 'why' behind the numbers.

• Conceptual Clarity: Can you explain the shift from a 'calorie-centric' to a 'broader consumption' and then to a 'normative multi-dimensional' approach? This shows you understand the evolving definition of poverty.
• Policy Implications: A higher poverty line (Rangarajan) means more people are classified as poor, expanding the target group for welfare schemes like the National Food Security Act, 2013. A lower line (Tendulkar) has fiscal implications, potentially reducing the beneficiary base. You must be able to connect these estimates to fiscal policy and government expenditure.
• Current Context: While the Tendulkar committee's estimates remain the last officially accepted figures for poverty, you must mention the current approach. India has moved towards a Multidimensional Poverty Index (MPI), developed by NITI Aayog in line with the global MPI (UNDP & OPHI). As per NITI Aayog's 'National Multidimensional Poverty Index: A Progress Review 2023', India's multidimensional poverty fell from 24.85% in 2015-16 to 14.96% in 2019-21. Mentioning the MPI demonstrates that you are up-to-date and can see the bigger picture beyond just consumption-based poverty lines.
• Critical Analysis: A good answer will conclude by noting that while each committee improved upon its predecessor, all consumption-based measures are limited. The move towards the MPI, which includes indicators for health, education, and standard of living, reflects a more holistic understanding of deprivation, which is the direction of modern social development policy.