SUMMARY
In the recent past, several researchers explored the added-values of Science Parks. On thebasis of empirical research, some questioned the assumed benefits of the science parkmodel, whereas others reported positive outcomes. As a result, mixed findings regardingthe benefits of science parks for firms can be observed. These mixed empirical findingsrequire a theoretical explanation. This paper argues that different levels and types ofknowledge exchange behaviour of science park firms could be one of the theoreticalexplanations for these mixed findings. The literature on networks mainly stresses thebenefits of networking in general, and networking between firms located on science parksin particular. This paper proposes that networks can have both positive (knowledge sharing)and negative effects (opportunistic behavior and knowledge spillovers) for firms located onscience parks. When the latter occurs, location on a science park might produce negativeeffects. A conceptual model is developed that summarises our theoretical arguments.