@unpublished{publication-6305,
	author={Buch, Claudia M and Koch, Cathérine and Koetter, Michael},
	institution={Deutsche Bundesbank},
	number={12/2009},
	pages=36,
	series={Series 2: Banking and Financial Studies},
	title={Margins of international banking: Is there a productivity pecking order in banking, too?},
	year=2009,
}