@unpublished{publication-5318,
	author={Goeree, Jacob K and McConnell, Margaret A and Mitchell, Tiffany and Tromp, Tracey and Yariv, Leeat},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 432},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={The 1/d Law of Giving},
	year=2009,
}