@unpublished{publication-7005,
	author={Bell, David B and Ledoit, Olivier and Wolf, Michael},
	institution={University of Zurich},
	issn={1664-7041},
	number=79,
	pages=26,
	series={Working paper series / Department of Economics},
	title={A new portfolio formation approach to mispricing of marketing performance indicators with an application to customer satisfaction},
	year=2013,
}