Harrod-Domar Model: Growth from Saving and Investment [Assumptions, Importance, Limitations] Updated: August 18, 2024 · Reviewed by: Ahmad NasrudinWhat’s it: The Harrod-Domar model is an economic growth model that uses saving and investment as growth sources. The model takes two economists, Sir Roy Harrod and Evsey Domar, who independently developed the model in 1939 and 1946. The