@unpublished{publication-8050,
	author={Dietl, Helmut and Lang, Markus and Lin, Panlang},
	institution={University of Zurich},
	issn={2296-0422},
	number=315,
	pages=25,
	series={UZH Business Working Paper Series},
	title={The effects of introducing advertising in pay TV: a model of asymmetric competition between pay TV and free TV},
	year=2012,
}