Market Power in the Norwegian Electricity Market: Are the Transmission Bottlenecks Truly Exogenous?
研究挪威南部电价区生产者是否利用公开的传输容量信息诱导拥堵以行使市场势力，发现夜间和早晨时段拥堵是内生的，平均加价约19.5%。
In this paper, we test whether producers in the southern Norway price zone utilize information on available transmission capacity to induce transmission congestion in their price zone to exercise market power or not. Endogeneity results for import congestion suggest that congestion is endogenous during late night and morning hours implying that producers in southern Norway restrict their output to induce transmission congestion into their price zone. We find an average markup of about 19.5 percent above the marginal cost during these hours. These results point that NordPool’s policy of making transmission capacity information public to ensure market transparency is not welfare maximizing as strategic producers can use this information to anticipate and induce transmission congestion into their price zone for driving prices away from the competitive levels.