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Information Economics and Policy > 2004 > 16 > 3 > 323-345
Utilities Policy > 2004 > 12 > 2 > 61-63
Utilities Policy > 2004 > 12 > 2 > 71-75
Utilities Policy > 2004 > 12 > 2 > 87-91
Information Economics and Policy > 2001 > 13 > 2 > 137-165
International Journal of Industrial Organization > 2001 > 19 > 5 > 841-859
European Economic Review > 2000 > 44 > 4-6 > 762-772
European Economic Review > 2000 > 44 > 4-6 > 845-855