@unpublished{publication-5307,
	author={Wilbur, Kenneth C and Goeree, Michelle S and Ridder, Geert},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 449},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Effects of Advertising and Product Placement on Television Audiences},
	year=2009,
}