@article { Geppert2008,
 title = {Economic growth of agglomerations and geographic concentration of industries - evidence for West Germany},
 author = {Geppert, Kurt and Gornig, Martin and Werwatz, Axel},
 journal = {Regional Studies},
 number = {3},
 pages = {413-421},
 volume = {42},
 year = {2008},
 url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-133160},
 abstract = {During the two decades from 1980 to 2000 there has been no clear overall trend of economic convergence or divergence among West German regions. But a number of already rich regions - generally large agglomerations - have succeeded in further distancing themselves from the rest. At the same time, we identify knowledge-intensive services as industries whose geographical concentration was initially high and continued to increase. Logistic and nonparametric regression estimates show that the higher a region’s share of employment in these service sectors the greater the probability that a region is classified as being rich and getting even richer.},
}