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    Some approaches to the study of human migration.

    Nabi AK; Krishnan P

    In: Methodology for population studies and development, edited by Kuttan Mahadevan, Parameswara Krishnan. New Delhi, India, Sage, 1993. 82-121.

    Migration can be obligatory (transfers in job, joining husbands place) or sequential (the movement of dependents), besides being voluntary. The major data sources for the study of migration are population censuses, sample surveys, and population registers. A continuous population registration system has been in existence in the Scandinavian countries, a few West European countries, Taiwan, Israel, Japan, and some East European countries. Developed countries have developed techniques of estimating migration without sample surveys by using other sources built in within their social system. The censuses are the most widely used data sources for migration research where direct questions on migration (place of birth, place of last residence, place of residence at a specific prior date, and duration of residents) set the focus on the volume, level and pattern, differential selectivity, origin, and destination. Migration can be measured by the direct (census or sample survey) and indirect (residual methods from vital statistics and survival ratios based on census and/or life table) approaches. Selectivity in migration deals with differences in migration related to age, sex, marital status, education, occupation, ethnic origin, and language. Other topics addressed include determinants of migration; statistical generalizations and laws (Ravenstein's laws, push-pull theory); typologies; economic, spatial, behavioral, and mathematical approaches in migration theory; Zelinsky's hypothesis of migration/mobility transition; and the demographic, economic, and social consequences of migration. The migration process in multidimensional, time and space specific, thus a single theory is not comprehensive enough to explain its dynamics. Instead, a series of theories can be formulated: theory of migration for peasants, theory of migration for intellectuals, and theory of migration for cultural groups. This necessitates the development of comprehensive typologies of migration.
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