Poverty Measurement and Identification — Revision Notes

⚡ 30-Second Revision

Checked 18 October 2026.
Headcount = poor persons / population; it measures incidence, not depth.
A 200 shortfall against a 1,000 line is 20%.
World Bank 2025 line uses 2021 PPP.
Publication year ≠ survey year.

2-Minute Revision

Fix concept, unit, threshold, period and denominator. A count of households is not automatically a count of people. Changes below a threshold can leave headcount unchanged. Compare prices and methods before trends, and label interpolation or extrapolation accurately.

5-Minute Revision

In ten people, two remain poor while each person’s resources fall from 800 to 600 against a hypothetical line of 1,000. Calculate the unchanged headcount and changed individual shortfalls. Explain which additional information is needed to compare two reports using different survey periods.

Vyyuha Quick Recall

CUTPD: Concept; Unit; Threshold; Period; Denominator—check all five before comparing.