Radelet's focus is on the following sample of countries: Group of answer choices 109 developing countries with a standardized GDP per capita of $3000 or less sometime between 1960 and 2013 all developing countries with more then 50% of their population living on less than a standardized $2/day all countries categorized as low-income by the United Nations all developing countries living under authoritarian regimes with a GDP/cap of less than a standardized $1000/yr