1. Andersen, T.M.: International integration, risk and the welfare state. Scand. J. Econ. 104(3), 343–364 (2002)
2. Barr, N.: The Economics of the Welfare State, 3rd edn. Stanford University Press, Stanford (1998)
3. Bloodgood, E.A., Tremblay-Boire, J.: International NGOs and national regulation in an age of terrorism. VOLUNTAS Int. J. Volunt. Nonprofit Organ. 22(1), 142–173 (2011)
4. Clark, J.: The state and the voluntary sector. Human resources working papers, 1(2) (1993)
5. Dolnicar, S., Lazarevski, K.: Marketing in non-profit organizations: an international perspective. Int. Mark. Rev. 26(3), 275–291 (2009)