Comparison between Harrod-Domar and Solow model of growth

Comparison of Harrod and Solow model of growth 
1. Both the models take the Keynesian framework but differ from Keynesian assumption that investment does not affect the stock of capital.
2. Equilibrium condition of both models is that the economy should grow at a constant proportionate rate.
3. The common difficulty of both the models is that achievement of equilibrium at (Yf) is very difficult.
4. In both the models it is assumed that  (COR) remains constant. In Solow model, it is due to technological inflexibility and variability of interest rate.
5. According to both models equilibrium of the economy is unstable. In Harrod model mechanism of stability lies in the interaction of investment function with the basic equation of the model.
  In Solow model cause of instability is gradual declined of investment incentives through the machine is not explicit.
6. Both the economists have similar view of the economy. Future of the economy is dark in which economy's long run fate is either unemployment or idle excess of productivity capacity.

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