International Migration and Development: The Changing Impact of Migration on Redistributing Global Population

This research note explores the impact of international migration on global population distribution since 1990s. The is a function both intensity as well effectiveness migration, that imbalance between flows and counter-flows. presence reciprocal well-recognized feature systems; however, this dimension has been difficult to capture at level due lack origin-destination flow data. In note, we apply metrics developed for analysis internal explore over time, across levels human development. five years 2020, redistributed 0.39 percent world's (28 million people) despite 1.38 (101 million) changing country residence. declined from 0.56 in 1990–1995. decline underpinned by reduction effectiveness, is, system becoming more balanced time. was greatest countries Very High development, reflecting high exchanges Low significant asymmetry flows. Our results suggest systematic shifts pattern development ladder, with intense higher