Concerning his critical minimum effort thesis, he claimed that the underdeveloped countries are trapped by the vicious circle of poverty and many other growth retarding factors, which keep them in the state of backwardness.Those countries need to increase their per capita income to a certain level in which they can maintain a self-sustained growth rate. They need a critical minimum effort and thus to invest at more than a minimum level to overcome all of the obstacles of the underdeveloped countries.
