middle-income developing country

…capita incomes below $400; “middle-income developing countries” were defined as those with per capita incomes between $400 and $4,000. To be sure, countries with the same per capita income may not otherwise resemble one another: some countries may derive much of their incomes from capital-intensive enterprises, such as the…

…oil exporters and relatively industrialized middle-income countries had the highest rates. Whereas the centrally planned economies had above-average rates of productivity growth in the period 1950–70, after 1970 they fell below average.