For demography, human migration is movement that changes a person's place of usual residence across a specified territorial boundary. Counts depend on the boundary, the residence criterion and the observation interval. A commuter crossing daily and a person changing residence therefore need not be counted alike.
In the demographic balancing equation, immigration adds residents and emigration removes them, so net migration is . If a district gains 800 and loses 500 residents by migration during a year, its net migration is 300, while the total number of moves is 1300. Net migration alone can conceal substantial turnover. Movement between two districts contributes to each district's account but cancels in the national total if both districts are inside the same national boundary. This accounting viewpoint is the quantitative aspect used here.
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Human migration is the movement of individuals or groups of people from one place to another, often across geopolitical boundaries. This movement can be temporary or permanent and occurs for a variety of reasons, which can be classified into several categories: 1. **Economic Migration**: People may move to seek better employment opportunities, higher wages, or improved working conditions. 2. **Political Migration**: Some individuals migrate to escape conflict, persecution, or oppressive regimes in their home countries. This includes refugees and asylum seekers.