Again, the subject under discussion is not GDP share but why the top 100 firms in Europe are growing less quickly than the top 100 firms in the US, and why ther

Again, the subject under discussion is not GDP share but why the top 100 firms in Europe are growing less quickly than the top 100 firms in the US, and why there are fewer rapidly growing firms. As these are exceptional situations, they should not show up in aggregate data like average hours worked or GDP shares. It's a bit like asking whether there is a relationship between overall literacy rates and the number of Nobel Prizes awarded. It is all about the tail of the distribution, not the mean.