6256 Production and Growth
62. The catch-up effect says that countries with low income can grow faster than countries with
higher income.
However, in statistical studies that include many diverse countries we do not observe the catch-
up-effect unless we control for other variables that affect productivity. Considering the
determinants of productivity, list and explain some things that would tend to prohibit or limit a
poor country‘s ability to catch up with the rich ones.
63. Some data that at first might seem puzzling: The share of GDP devoted to investment was similar
for the United States and South Korea from 1960–1991. However, during these same years South
Korea had a 6 percent growth rate of average annual income per person, while the United States
had only a 2 percent growth rate. If the saving rates were the same, why were the growth rates
so different?