For the tertiary level, the population used is the five-year age group starting from the official secondary school graduation age. The pattern is observed in all the countries analysed and is much wider in emerging economies than in the average OECD country. The gap is narrowest among the youngest NEETs (15 to 19 years old) and widens with age - a reflection of the fact that while the gender gap in school enrolment has disappeared in most countries, gender differences in labour force participation persist.