Green Serves the Dirtiest: On the Interaction between Black and Green Quotas

Posted: 6 Nov 2009

See all articles by Christoph Böhringer

Christoph Böhringer

University of Oldenburg - Economic Policy; Centre for European Economic Research (ZEW)

Knut Einar Rosendahl

Norwegian University of Life Sciences; Statistics Norway - Research Department

Date Written: October 2009


Tradable black (CO2) and green (renewables) quotas gain in popularity and stringency within climate policies of many OECD countries. The overlapping regulation through both instruments, however, may have important adverse economic implications. Based on stylized theoretical analysis and substantiated with numerical model simulations for the German electricity market, we show that a green quota imposed on top of a black quota does not only induce substantial excess cost but serves the dirtiest power technologies as compared to a black quota regime only.

Keywords: emissions trading, green quotas, overlapping regulation

JEL Classification: D61, H21, H22, Q58

Suggested Citation

Bohringer, Christoph and Rosendahl, Knut Einar, Green Serves the Dirtiest: On the Interaction between Black and Green Quotas (October 2009). CESifo Working Paper Series No. 2837. Available at SSRN:

Christoph Bohringer

University of Oldenburg - Economic Policy ( email )

Centre for European Economic Research (ZEW) ( email )

D-68161 Mannheim
+49 6211235200 (Phone)
+49 6211235226 (Fax)

Knut Einar Rosendahl (Contact Author)

Norwegian University of Life Sciences ( email )

PO Box 5033
NO-1432 Aas
+47 64966117 (Phone)

Statistics Norway - Research Department ( email )

Kongens Gt. 6
PO Box 8131 Dep
N-0033 Oslo
+47 21094954 (Phone)
+47 21094963 (Fax)

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