Long term dynamics of poverty transitions in India
Anand Sahasranaman

TL;DR
This paper models the long-term dynamics of poverty in India using a stochastic approach, revealing trends in poverty transitions, persistence, and the impact of poverty line choices from 1952 to 2006.
Contribution
It introduces a stochastic Geometric Brownian Motion model to analyze poverty dynamics, highlighting the differing behaviors of transient and persistent poverty over time.
Findings
Annual poverty transitions are common and increasing.
Poverty persistence is declining but still significant.
Higher poverty lines lead to lower transition rates and higher persistence.
Abstract
We model the dynamics of poverty using a stochastic model of Geometric Brownian Motion with reallocation (RGBM) and explore both transient and persistent poverty over 1952-2006. We find that annual transitions in and out of poverty are common and show a rising trend, with the rise largely being driven by transitions out of poverty. Despite this promising trend, even toward the end of the time frame, there is a non-trivial proportion of individuals still transitioning annually into poverty, indicative of the economic fragility of those near the poverty line. We also find that there is still a marked persistence of poverty over time, though the probability of poverty persistence is slowly declining. Particularly concerning in this context are the poverty trajectories of those at the very bottom of the income distribution. The choice of poverty line appears to impact the dynamics, with…
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