@unpublished{publication-5455,
	author={Halbheer, Daniel and Fehr, Ernst and G{\"o}tte, Lorenz and Schmutzler, Armin},
	institution={University of Zurich},
	number={No. 711},
	series={Working paper series / Socioeconomic Institute},
	title={Self-Reinforcing Market Dominance},
	year=2007,
}