@unpublished{publication-13300,
	author={Bartling, Bj{\"o}rn and Gesche, Tobias and Netzer, Nick},
	institution={University of Zurich},
	issn={1664-7041},
	number=225,
	pages=14,
	series={Working paper series / Department of Economics},
	title={Does the absence of human sellers bias bidding behavior in auction experiments?},
	year=2016,
}