@unpublished{publication-5715,
	author={Frey, Bruno S and Luechinger, Simon},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 136},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Terrorism: Deterrence May Backfire},
	year=2002,
}