Concentration, Coagglomeration and Spillovers: The Geography of New
Market Firms in Germany
The authors employ the ‘dartboard approach’ pioneered by Ellison and Glaeser to analyze the spatial concentration of New Economy employment in Germany, the coagglomeration of firms belonging to different sub-sectors of Neuer Markt and the
(intraregional) spillovers between different high tech industries.
Link
http://www.ersa.org/ersaconfs/ersa03/cdrom/papers/230.pdf