Age data frequently display excess frequencies at round or attractive ages, such as even numbers and multiples of five. This phenomenon of age heaping has been viewed as a problem in previous research, especially in demography and epidemiology. We see it as an opportunity and propose its use as...

This study is the first to explore long-run trends of numeracy for the 1820-1949 period in 165 countries, and its contribution to growth. Estimates of the long-run numeracy development of most countries in Asia, the Middle East, Africa, America, and Europe are presented, using age-heaping...

A swelling stream of literature employs age-heaping as an indicator of human capital, more specifically of numeracy. We re-examine this connection in light of evidence drawn from nineteenth century Italy: census data, death records, and direct, qualitative evidence on age-awareness and numeracy....