What you are trying to say is that the average GDP per capita of Berlin is lower than the average of Germany, thus having an overall negative effect on the per

What you are trying to say is that the average GDP per capita of Berlin is lower than the average of Germany, thus having an overall negative effect on the per capita numbers for Germany. In this, Berlin stands alone among capitols. Usually, capitols are major "benefits" to their respective countries GDP per capita numbers. But the statistic I assume you are referencing is a few years old, and Berlin has been the fastest growing state in Germany for quite a while now, a development that is still increasing. The numbers for 2019 aren't out yet, but I assume that at this point, Berlin is exactly average in per capita terms for Germany. Why Berlin has been an outlier for capitols is quite obvious: It has only been Germanys capitol for a bit less than 30 years, and before that was divided.