I thought of that as well. But while there is a mostly free movement of goods, there isn't a free movement of people.

Plus from a motivational point of view adding in Mexico and Canada does nothing for those keen to improve the state of US manufacturing. Inside Europe there would be similar reports comparing the individual countries - and I suspect at the US state level there might be studies as well.

With the free movement of people though internal competition is less beneficial. (although geographic spread is still desirable.)