There was a study of academic collaboration (measured by co-authored journal publications) showing that collaboration between academics increases as the distanc

There was a study of academic collaboration (measured by co-authored journal publications) showing that collaboration between academics increases as the distances between offices shrinks. Office is across campus? Office is in the building next door? Office is in the same building, different floor? Office is in the same hallway, but way at the end? Office is right beside? All of these correlate with number of journal articles co-authored!