Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/100064 
Year of Publication: 
2014
Series/Report no.: 
ZEW Discussion Papers No. 14-048
Publisher: 
Zentrum für Europäische Wirtschaftsforschung (ZEW), Mannheim
Abstract: 
While liberalization in energy markets has been a widely successful process all over the world, incumbents often still hold a dominant position. Thus, electricity wholesale markets are subject to market surveillance. Nevertheless, consolidated findings on abusive practices of market power and their cause and effect in wholesale electricity markets are scarce and non-controversial market monitoring practices fail to exist. Our application of the established measure of market concentration RSI shows that it serves as a decent indicator for the rents that can be gained in the market but also reveals considerable weaknesses of the RSI. Therefore, we propose and apply the "Return on Withholding Capacity Index" (RWC) representing a measure of the firms' incentive of withholding capacity as a complementary index to the RSI.
Subjects: 
Market Power
Electric Power Markets
Measurement
JEL: 
L11
L43
L94
K23
C13
Document Type: 
Working Paper

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