Life expectancy at age 65 years old is the average number of years that a person at that age can be expected to live, assuming that age-specific mortality levels remain constant. However, the actual age-specific death rate of any particular birth cohort cannot be known in advance. If rates are...

Monetary aggregates are the money circulating in an economy to satisfy its current monetary needs. There are two indicators for monetary aggregates collected by the OECD: "narrow money" (M1); a means of exchange and "broad money" (M3); a way to store value. Monetary aggregates are measured as a...

Countries vary in the way they use marks, but they all tend to reward the mastery of skills and attitudes that promote learning. Teachers tend to give girls and socio-economically advantaged students better school marks, even if they don’t have better performance and attitudes than boys and...