The concept of a typical family refers to the family composition and the number of working adults in the family. To calculate the average number of children in a typical family per country, the current total fertility rate of the country has been taken into account, based on World Bank data (See http://data.worldbank.org/indicator/SP.DYN.TFRT.IN). In order to control for the average number of working adults in the typical family, a two-parent employment rate is assumed, adding up the national employment rates for both men and women. This information is taken from the ILO EAPEP database (See http://laborsta.ilo.org/applv8/data/EAPEP/eapep_E.html). Further assumptions underlying the typical family model require that the adults included are of economically active age, that the family lives in an urban environment, that all household members are in good health, and that the adult family members are competent to manage the family budget efficiently (See http://www.wageindicator.org/main/salary/livingwage/faq-living-wage).