Adema, W., P. Fron and M. Ladaique (2011), "Is the European Welfare State Really More Expensive?: Indicators on Social Spending, 1980-2012; and a Manual to the OECD Social Expenditure Database (SOCX)", OECD Social, Employment and Migration Working Papers, No. 124, OECD Publishing, Paris, https://doi.org/10.1787/5kg2d2d4pbf0-en.