Typically, the papers that estimate global inequality do not use primary data from household surveys, but rather compilations of secondary data. Most have used the compilation by Klaus Deininger and Lyn Squire (1996), which reports only the Gini coefficient and quintile shares of national distributions. These data on within-country inequality are then combined with national accounts data on countries’ mean GDP (or consumption) per capita.Thus, the relative distribution in each country is based on (secondary) data from household surveys, which is scaled to a national accounts mean.

Verstehe den letzten Satz dieses Abschnittes leider nicht, weshalb ich hier fragen möchte, ob mir jemand helfen kann. Der Rest ist klar... Aber was ist bloss mit "scaled to a national accounts mean" gemeint?

Danke für eure Hilfe