@unpublished{publication-14178,
	author={Ledoit, Olivier and Wolf, Michael and Zhao, Zhao},
	institution={University of Zurich},
	issn={1664-7041},
	number=238,
	pages=51,
	series={Working paper series / Department of Economics},
	title={Efficient sorting: a more powerful test for cross-sectional anomalies},
	year=2018,
}