During this period, migration research coalesced around a development-oriented, systems view. Studies prioritized cross-sector dynamics, household decision making, and the feedback between labor markets and geographic flows. Methodologically, scholars integrated theoretical models with qualitative and comparative data to capture temporality and policy contexts that shape migration. Historical Significance: Breakthroughs include a two-sector framework showing that rural-urban migration persists despite urban unemployment due to differential productivity and sectoral dynamics; the household economics of migration reframing migration as a risk-management strategy contingent on deprivation and joint decisions; and a systems approach that integrates pull-push forces, policy constraints, and cross-sector interactions, shifting the field toward holistic dynamics. Cross-country evidence further linked emigration with development trajectories and aid effects, informing both theory and policy.