The Harrod-Domar Model II

The Harrod-Domar model suggests that economic growth depends on higher savings and the efficient use of capital. However, it assumes that all savings are automatically converted into investments.

The model also assumes a fixed capital-output ratio, meaning the amount of capital required to produce one unit of output remains constant. Additionally, it assumes that the economy operates under full employment conditions. These assumptions, however, are not always realistic.

For example, if a country saves 20% of its income and the capital-output ratio is 4, the model predicts a growth rate of 5%.

But what happens if savings don’t translate into actual investment? If technological advances make machines become more efficient over time, or if the economy is not operating at full employment?

The model cannot account for such changes. Moreover, it does not consider vital growth drivers such as labor force participation or the level of human capital that is increased through education. These omissions are particularly significant for developing countries.