@inbook{publication-617,
	address={Cheltenham, UK},
	author={Dietl, Helmut and Jaag, Christian and Lang, Markus and Lutzenberger, Martin and Trinkner, Urs},
	booktitle={Reinventing the postal sector in an electronic age},
	editor={Crew, M A and Kleindorfer, P R},
	isbn={978-1-84980-360-1},
	pages={267-280},
	publisher={Elgar},
	series={Advances in regulatory economics series},
	title={Impact of VAT-exemptions in the postal sector on competition and welfare},
	year=2011,
}