• Knowledge spillovers and the timing of R&D policy 

      Bjertnæs, Geir Haakon; Heggedal, Tom-Reiel; Jacobsen, Karl (Discussion Papers;635, Working paper, 2010)
      We analyze how knowledge spillovers influence the optimal timing of R&D policy. Using numerical simulations we find that optimal subsidies to R&D may be rising over time even when the returns to knowledge is decreasing. ...
    • On R&D anf the undersupply of emerging versus mature technolgies 

      Heggedal, Tom-Reiel (Discussion Papers;571, Working paper, 2008)
      An important policy question is whether research and development (R&D) in new, emerging technologies should be more subsidized than R&D in other more mature technologies. In this paper I analyze if innovation externalities ...