[1] Politecn Milan, Dept Management Econ & Ind Engn, Milan, Italy
[2] Reykjavik Univ, Ctr Res Innovat & Entrepreneurship, Reykjavik, Iceland
[3] Stockholm Sch Econ, House Innovat, Stockholm, Sweden
[4] Delft Univ Technol, Delft, Netherlands
[5] Imperial Coll Business Sch, London, England