Henning Bunzel, Aarhus University, Denmark, hbunzel@econ.au.dk

Jaanika Meriküll, Tartu University, Estonia, jaanika.merikull@ut.ee

Markku Lanne, University of Helsinki, Finland. markku.lanne@helsinki.fi

Lars Jonas Andersson, Norwegian School of Business Administration and Economics, Bergen, Norway, jonas.andersson@nhh.no

Rickard Sandberg, Stockholm School of Economics, Sweden. rickard.sandberg@hhs.se