John Marcus Fleming, 1911-1976, was a Scottish economist and public servant who worked in many well-known international organizations, including the International Monetary Fund and the United Nations.
His contributions to Economics are mostly in the field of welfare economics, trade and exchange policies. Fleming and Robert Mundell both presented researches on stabilization policy in open economies, and about at the same time, which would end up forming the Mundell-Fleming model. Fleming´s model, depicted in his article “Domestic Financial Policies under Fixed and under Floating Exchange Rates”, 1962, was more realistic as it assumed imperfect capital mobility, and thus made this one a more rigorous and comprehensive model. However, nowadays, his model has lost cogency, as the actual world situation has more resemblance with total capital mobility, which corresponds better to Mundell’s view.