This article challenges conventional wisdom by arguing that greater longevity cannot explain the significant accumulation of human capital during the transition from stagnation to growth. This is because greater longevity raises children’s future income proportionally at all levels of...

Cannabis is the most popular illegal drug. Its legal status is typically justified on the grounds that cannabis use has harmful consequences. Empirically investigating this issue has been a fertile topic for research in recent times. We provide an overview of this literature, focusing on studies...

We construct a revised version of the Barro and Lee (1996) data set for a sample of OECD countries using previously unexploited sources and following a heuristic approach to obtain plausible time profiles for attainment levels by removing sharp breaks in the data that seem to reflect changes in...

The perpetual inventory method used for the construction of education data per country leads to systematic measurement error. This paper analyses the effect of this measurement error on GDP regressions. There is a systematic difference in the education level between census data and observations...

Age data frequently display excess frequencies at attractive numbers, such as multiples of five. We use this "age heaping" to measure cognitive ability in quantitative reasoning, or "numeracy". We construct a database of age heaping estimates with exceptional geographic and temporal coverage,...

We examine the contribution of human capital to economy-wide technological improvements through the two channels of innovation and imitation. We develop a theoretical model showing that skilled labour has a higher growth-enhancing effect closer to the technological frontier under the reasonable...

This paper surveys the empirical literature on the growth effects of education and social capital. The main focus is on the cross-country evidence for the OECD countries, but the paper also briefly reviews evidence from labour economics, to clarify where empirical work on education using macro...