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The Journal of Industrial Economics > 71 > 1 > 176 - 191
Economics Letters > 2013 > 120 > 3 > 379-383
Spanish Economic Review > 1999 > 1 > 3 > 283-299
The Journal of Industrial Economics > 71 > 1 > 176 - 191
Economics Letters > 2013 > 120 > 3 > 379-383
Spanish Economic Review > 1999 > 1 > 3 > 283-299