Theoretically scale economies in delivery are not firm specific.
Scale economies are not firm specific.
Scale economies are  firm specific.
The man is standing in the attic opening.
The island is inaccessible by any vehicles and can only be navigated by foot.
A young woman is running beside a Big Train.
Centuries old mansions line the entrance to the Place de la Carriyre.
This person is sitting down
A man is waiting in the office.