Beyen Marktforschung collects the prices of electronic consumer goods and analyses the effects of special offers and promotions with data collected in Germany, Austria, France, Italy, the Netherlands, Eastern Europe, the UK, US and Canada.
The company was set up in 1986 and employs nearly 60 staff in Germany, with an annual turnover of €3.9m (£2.7m) last year.
Nicolas Brouet, chairman of the GfK's parent company IFR, said: "The acquisition of Beyen Marktforschung will enable us to offer clients a better and more comprehensive service.
"This refers, in particular, to market information about promotional activities in consumer electronics markets in Europe and the US."
The GfK Group achieved sales of €595m in 2003 from more than 135 subsidiaries in 57 countries across the world. It has five business divisions; retail and technology, consumer tracking, healthcare, media, and custom research.
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