Affiliation: | 1Division of Business Administration and Management, Lule? Univ. of Technology, SE-971 87 Lule?, Sweden (corresponding author). E-mail: pererik.eriksson@ltu.se 2Divsion of Business Administration and Management, Lule? Univ. of Technology, SE-971 87 Lule?, Sweden. E-mail: torbjorn.nilsson@ltu.se
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