The annual growth rate (g) and investment rate are given by 5.8% and 23.10% respectively. The Harrod - Domar model assumes that the investment rate equals the saving rate (s), so the saving rate is 23.10%. To calculate the incremental capital - output ratio, ICOR (v), use the Harrod - Domar equation given by = or to account for a zero value of depreciation you have to use this formula, = .