During the period 1960-1966, research concentrated on how the balance of payments adjusts under fixed and flexible exchange rates when capital can move across borders, bringing reserves, speculation, and policy constraints to the forefront. A dynamic, open-economy perspective emerged, integrating capital flows into stabilization discussions and highlighting the interdependence of monetary policy, fiscal choices, and exchange-rate regimes. Methodologically, scholars shifted toward frameworkbuilding that foregrounds regime choice, reserve considerations, and risk in cross-border finance.