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Ethical Theory and Moral Practice > 2013 > 16 > 1 > 139-149
European Economic Review > 1995 > 39 > 3-4 > 683-689
Ethical Theory and Moral Practice > 2013 > 16 > 1 > 139-149
European Economic Review > 1995 > 39 > 3-4 > 683-689