Other means of encouraging interactions and sharing may be more useful and affordable. Lower-cost options could include setting up resource centres, and technology transfer centres for firms in or near universities, and organizing frequent conferences and seminars in order to bring together domestic and foreign scientists, engineers, entrepreneurs, practitioners and policymakers. Furthermore, it is possible that, over time, virtual science parks will replace physical parks. However, to the extent that (as noted above) the goal of the park is to encourage interactions among actors, the importance of physical proximity cannot be underestimated.