Footnote
a Averages, especially worldwide averages, can be misleading, however. In many areas, families have seen no increase at all in their income in the past 50 years, while the wages of others have multiplied several times over.
a Averages, especially worldwide averages, can be misleading, however. In many areas, families have seen no increase at all in their income in the past 50 years, while the wages of others have multiplied several times over.