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What is Cohort-based Migration Metric (CMM) ?

Cohort-based Migration Metric (CMM) .

In order to further analyze recent trends in labour mobility, a Cohort-based Migration Metric (CMM) is developed to gauge net migration at the state and district level. 

This metric considers net migration to be the percentage change in population between the 10-19 year-old cohort in an initial census period and the 20-29 year old cohort in the same area a decade later, after correcting for mortality effects.

It is likely to capture labour migration, as other bilateral movements for reasons such as marriage are netted out in the equation. 

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