I imagine you could look at U.S. banking before and after 1980 to get some sense of what an industry looks like before and after mergers became legal. https://

I imagine you could look at U.S. banking before and after 1980 to get some sense of what an industry looks like before and after mergers became legal. https://en.wikipedia.org/wiki/Depository_Institutions_Deregulation_and_Monetary_Control_Act https://en.wikipedia.org/wiki/Depository_Institutions_Deregu...