Bank Dunia nguningayang ngepah wewidangan ipuné minakadi AsiaTimur miwah Pacifik, Eropa miwah Asia Tengah, Amerika Latin miwah Caribbean, Timur Tengah miwah Afrika Utara, Amerika Utara, Asia Selatan, miwah subSahara Afrika.
The World Bank surveyed households in the regions of East Asia and Pacific, China, Eastern Europe and Central Asia, Latin America and the Caribbean, Middle East and North Africa, South Asia, and sub-Saharan Africa.