When are companies most successful at exploiting workers? When their junior employees don’t realize how much their managers are profiting from their work, according to a new study from the University of Heidelberg. (Flickr/ToGa Wanderings) Three economists set up a lab experiment with 2,500 volunteers to test the conditions under which senior workers attempt to exploit junior ones. Both are working on a project together, and the more effort that the junior worker puts in, the less the senior…