Professor Thomas Allen is the originator of the Allen curve. In the late 1970s, Tom Allen undertook a project to determine how the distance between engineers' offices coincided with the level of regular technical communication between them. The results of that research, now known as the Allen Curve, revealed a distinct correlation between distance and frequency of communication (i.e. the more distance there is between people - 50 meters or more to be exact - the less they will communicate). This principle has been incorporated into forward-thinking commercial design ever since, in, for example, The Decker Engineering Building in New York, the Steelcase Corporate Development Center in Michigan, and BMW's Research Center in Germany.