What is the implication of the diminishing returns to physical capital for economic growth of different countries over time? (Hint: think about what is predicted to happen to the gap between rich and poor countries). Use examples of countries in Table 26.1(Real GDP measured in 2005

source:- Alan Heston, The Penn World table) where this implication seems to be confirmed in the data in the period 1950-2014, as well as those that contradict this implication.

Real GDP measured in 2005

source:- Alan Heston, The Penn World table