---
title: "LASI: Longitudinal Ageing Study in India | Model Diplomat"
description: "The Longitudinal Ageing Study in India (LASI) surveys 72,000+ adults aged 45+, India's first such panel on ageing—key data for UPSC GS1 demography and policy."
url: "https://modeldiplomat.com/learn/glossary/longitudinal-ageing-study-india"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Longitudinal Ageing Study in India is a nationally representative panel survey of adults aged 45 and older, tracking their health, economic, and social conditions.
- Who conducts the Longitudinal Ageing Study in India and who funds it?
- How does LASI differ from the National Family Health Survey (NFHS)?
- What makes LASI 'longitudinal' rather than just a large one-time survey?
- What is LASI-DAD and why does it matter?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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## Positions at a glance

### Supporters

The Longitudinal Ageing Study in India (LASI) is India's first and largest nationally representative panel survey dedicated to the population aged 45 years and older, together with their spouses irrespective of age. It was commissioned by the Ministry of Health and Family Welfare (MoHFW) and executed by the International Institute for Population Sciences (IIPS), Mumbai, in scientific collaboration with the Harvard T.H. Chan School of Public Health and the University of Southern California. The study draws methodological and financial support from the National Institute on Aging (NIA) of the United States and the United Nations Population Fund (UNFPA). LASI belongs to a global family of harmonised ageing surveys modelled on the U.S. Health and Retirement Study (HRS), enabling cross-national comparison with the English Longitudinal Study of Ageing (ELSA), the Survey of Health, Ageing and Retirement in Europe (SHARE), and the China Health and Retirement Longitudinal Study (CHARLS). Its statutory rationale lies in the data gap identified by the National Policy on Older Persons (1999) and the Maintenance and Welfare of Parents and Senior Citizens Act, 2007, both of which presupposed evidence that did not then exist at scale.

### Opponents

For the working practitioner—whether a UPSC aspirant addressing General Studies Paper I demography questions, a desk officer drafting elderly-welfare policy, or a researcher modelling India's old-age dependency ratio—LASI is the authoritative empirical foundation on Indian ageing. It supplies the evidence base for anticipating the fiscal pressures of a greying population, designing pension and long-term-care systems, and benchmarking India against comparator economies. Mastery of LASI's design, headline findings, and institutional lineage allows the professional to ground arguments about demographic transition in data rather than assertion, and to anticipate the policy debates that India's accelerating population ageing will force onto the agenda over the coming decades.

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Example

In January 2021, India's Ministry of Health and Family Welfare released the LASI Wave 1 India Report, drawing on interviews with 72,250 adults aged 45 and above conducted across 35 states and union territories.

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