In this paper, we want to provide new insights into why it differs. Country variation in the skills of less-educated adults: One possible reason why less-educated workers may fare better in some countries than in others is that the skills of the group vary across countries (Heisig and Solga, 2015, OECD, 2013, Park and Kyei, 2011). In particular, we would expect less-educated adults to achieve somewhat better labour market attainment in countries where they have higher levels of skills.