Reviews the current state of the art in research on the causes of international migration, & to prepare scientifically for the organization & execution of migration surveys & analytical studious in sending & receiving countries. Contains: determinants of internat'l. migration: theoretical approaches & an inventory for research; data availability; modeling internat'l. migration: econ. & econometric issues; Turkish migration to Western Europe; Sub-Saharan Africa; Migrations in Lithuania, Poland & the Ukraine; the future of East-West Migration, & more.