How dependent are British living standards on its capital city?
Core argument: Removing London's output and population would cut British living standards by 14%, enough to place the rest of the UK behind the last of the US states, though Britain in the aggregate is not as poor as Mississippi.
Removing London’s output and headcount would shave 14% off British living standards, precisely enough to slip behind the last of the US states. Britain in the aggregate may not be as poor as Mississippi, but absent its outlier capital it would be. By comparison, amputating Amsterdam from the Netherlands would shave off 5%, and removing Germany’s most productive city (Munich) would only shave off 1%. Most strikingly, for all of San Francisco’s opulent output, if the whole of the bay area from the Golden Gate to Cupertino seceded tomorrow, US GDP per capita would only dip by 4%.



