We define part-time employed as voluntarily part-time employed if the respondent answered ‘I do not want to work more hours’ when asked for the reasons of their part-time employment. While this def- inition corresponds to the standard definition of involuntary part-time in the insider-outsider literature (see Rueda, 2005, p. 63) ‘outsiders are then defined as those [. . .] employed part-time (unless they do not want a full time job’), the OECD defines involuntary part-time differently (see http://stats.oecd.org/ glossary/detail.asp?ID=2016). Employing the OECD definition leads to a lower rate of involuntary part- time employment.