Furthermore, Korean women are often still expected to leave employment at the birth of a child, so that mothers with children often are not in employment, or in a low-paying non-regular job, which increases the overall cost of having children (OECD, 2018[2i). Nevertheless, the overall standard of living of children increased from 2006 to 2012 in Korea, regardless of their family situation. Disposable income grew by 10.5% for the poorest 25 percent of children in two-parent families, and by 22% for the 25 percent poorest children in single-parent families (Figure 2). Nowadays, about a third of non-regular workers in Korea have completed tertiary education (OECD, 2018[7j), and a growing proportion of families headed by a highly educated fathers are in non-regular employment. In fact, the proportion of poor children with a father with higher education increased (+15 percentage points) between 2006 and 2012.