As a result, attention then shifted to the broad sample of countries in the Heston-Summers data set. As Figure 1 shows, convergence clearly fails in this broad sample of countries. Income per capita in 1960 is plotted on the horizontal axis. The average annual rate of growth of income per capita from 1960 to 1985 is plotted on the vertical axis.' On average, poor countries in this sample grow no faster than the rich countries.