If Berlin and its inhabitants are removed from the calculation, the 2015 German GDP per capita increased by 0.2 percent. In most other EU countries, the capital is an indispensable economic driving force – from Finland and Sweden to Great Britain and France down to Spain and Portugal. The most extreme example is Greece: Without Athens, Greece's GDP per inhabitant would have fallen by almost 20 percent. Quite similarly, the level of prosperity in Slovakia would be about 19 percent lower without Bratislava.
A wealthy capital, however, is not an end in itself. Problems of a too strong focus on one economic powerhouse were lately to be observed in the Brexit referendum, revealing a clear divide between the City of London and the rest of the UK.
The relatively weak economic position of Berlin is representative for the strength of the German federal system: Germany has many different economic centers – often also in rural areas, where numerous successful medium-sized companies are located. In other European countries, not only the administration, but also the economic power is often concentrated in the capital.
Apart from Berlin, the economic power of Rome is relatively weak. The Italian capital increases the GDP per capita only slightly. This is probably due to the strength of other economic centers, such as Milan and Turin.