HOW MUCH IS A COLLABORATION WORTH - A CALIBRATED BIBLIOMETRIC MODEL

Interest in collaboration is increasing in policy circles. There are n umerous international and national programs to encourage collaboration , for example, between university and industry researchers. However, l ittle is know about the way in which collaboration changes the impact of a research publication. This paper explores how the impact (average citations per paper) varies with different types of collaboration. A calibrated bibliometric model is derived that demonstrates that collab orating with an author from the home institution or another domestic i nstitution increases the average impact by approximately 0.75 citation s while collaborating with an author from a foreign institution increa ses the impact by about 1.6 citations.