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Migration data corrected for mortality risk: India, 1961-71.

P Ramachandran

    Janasamkhya
    |December 1, 1984
    PubMed
    Summary

    Census migration data underestimates population movement due to mortality. Correcting for this reveals a significant underestimation of migrants, particularly over longer periods before the 1971 Census.

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    Area of Science:

    • Demography
    • Population Studies
    • Sociology

    Background:

    • Census data typically captures surviving migrants, excluding those who died post-migration.
    • This exclusion leads to an underestimation of true migration rates.
    • Understanding migration dynamics is crucial for population studies and policy.

    Purpose of the Study:

    • To quantify the underestimation of migration in Indian census data due to mortality.
    • To correct Indian migration data for mortality risk.
    • To assess the impact of mortality on migration rate calculations.

    Main Methods:

    • Utilized Indian migration data from the 1971 Census.
    • Applied mortality risk corrections to the existing migration data.
    • Calculated migration rates before and after mortality adjustment.
    Keywords:
    AsiaDemographic FactorsDeveloping CountriesError SourcesIndiaMeasurementMigrationMigration, InternalMortalityPopulationPopulation DynamicsResearch MethodologySouthern Asia

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    Main Results:

    • A significant underestimation of migration was identified.
    • For a 5-year period prior to 1971, underestimation was approximately 4.8%.
    • For a 10-year period prior to 1971, underestimation was approximately 9.7%.

    Conclusions:

    • Mortality significantly impacts the accuracy of census-based migration data.
    • Adjusting for mortality provides a more accurate measure of population mobility.
    • Findings highlight the need to consider mortality in demographic analyses of migration.