@unpublished{publication-5399,
	author={Leibbrandt, Andreas and López-Pérez, Raúl},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 373},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={The Envious Punisher: Understanding Third and Second Party Punishment with Simple Games},
	year=2008,
}