Completar frases 85-testVersión en línea 85-test por Farhad Key 1 prices uniform developed rough income requires per Measuring poverty on a global scale establishing a poverty level across extremely divergent economies , which can result in only comparisons . The World Bank has defined the international poverty line as U . S . $1 and $2 day in 1993 Purchasing Power Parity ( PPP ) , which adjusts for differences in the of goods and services between countries . The $1 per day level is generally used for the least countries , primarily African ; the $2 ? per ? day level is used for middle economies such as those of East Asia and Latin America .