1. Mincer (1974); Psacharopoulos and Patrinos (2004); Card (1999); Heckman, Lochner, and Todd (2006).
2. Mulligan (1999); Murnane, Willett, Duhaldeborde, and Tyler (2000); Lazear (2003).
3. Murnane, Willett, Duhaldeborde, and Tyler (2000) separate the direct returns to measured skill from the indirect returns of more schooling.
4. For example, Psacharopoulos (1994) and Psacharopoulos and Patrinos (2004).
5. Harbison and Hanushek (1992).
6. Hanushek, Lavy, and Hitomi (2006).
7. Hanushek and Zhang (2006) show that the measure of quantitative literarcy in IALS is highly correlated with scores on the Third International Mathematics and Science Study (TIMSS).
8. De Gregorio and Lee (2002) fi nd a (somewhat weaker) positive association between inequality in years of schooling and income inequality.
9. Juhn, Murphy, and Pierce (1993).
10. CEDEFOP (European Centre for the Development of Vocational Training). 2007.
Building a European VET area, Agora conference (Thessaloniki).
—. 2010. Skills supply and demand in Europe: Medium-term forecast up to 2020, Feb.
(Thessaloniki).
11. European Commission (EC). 2010. New skills for new jobs: Action now, report by the
Expert Group, Feb. (Brussels).
12. International Labour Office (ILO). 2000. Conclusions concerning human resources
training and development, International Labour Conference, 88th session, Geneva,
2000 (Geneva).