In addition, the correlation coefficient of average schooling years and income inequality is positive.

平均受教育年限与收入不平等之间表现为正相关关系。

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The UN calculates a population's human capital based on its average years of schooling, the wage its workers can command and the number of years they can expect to work before they retire (or die).

ECONOMIST: A new report comes up with a better way to size up wealth

According to recent studies, indigenous Mexicans have an average of 4.6 schooling years compared to a mean of 7.9 years among non-indigenous people.

UNESCO: Bilingual Literacy for Life

Today the average Latin American adult has only five years of schooling, compared with nine years for his East-Asian counterpart.

ECONOMIST: Latin America