The Domar model. From a theory of economic cycle to a theory of growth of underdeveloped countries.

[Red-Right]

I understand how the Domar model explains the link between the level of income and the level of capacity utilization. R must equal ps.

Later on an implication for underdeveloped countries with scarce capital was derived.

I ask for an explanation of how the Domar model was "translated" for poor countries and how it works for them. Equations and text will be appreciated.