It can't be more straightforward: the more educated you are, the more likely you are to have a job. In every OECD country, without a single exception, a higher proportion of 25 to 64–year-olds with a tertiary level of education are employed than those with only an upper secondary degree. And likewise, those with an upper secondary qualification are generally far more likely to have a job than those with a level of education below that.
Across the OECD, some 85% of 25 to 64-year-olds with a tertiary education have a job, compared to an average of 59% of those with a secondary education or less. And the gap grows considerably wider for some countries (see our chart). With notable exceptions of Iceland and Korea, very few countries have managed to shrink this gap down.
It works for gender as well. Higher levels of education also bring the employment rates of women up to that of men. Men are generally more likely to be employed than women, but the discrepancy is much bigger among people with low levels of education.
While there is no such thing as a guarantee, this is a strong statistical relationship that exists over different countries.