Earlier results on estimating markup ratios as indicators of the competitive pressure are discussed and it is shown that the estimation method suggested by Roeger (1995) suffers from similar problems as an earlier method suggested by Hall (1988). It is also shown that the estimating equations...

In this paper, a test is made of whether the Danish electricity producer, Elsam, partly or fully exploits its temporary dominant position in hours of congestion at the Nordic electricity market. There seems to be evidences suggesting that Elsam is successful in pursuing its objective of having a...

In this paper a test is made of whether the Danish electricity producer, Elsam partly or fully exploits its temporary dominant position in hours of congestion at the Nordic electricity market. There seems to be evidences suggesting that Elsam is successful in pursuing its objective of having a...

Seasonality has been a major research area in economics for several decades. The paper asses the recent development in the literature on the treatment of seasonality in economics, and divides it into three interrelated groups. The first group, the Pure Noise Model, consists of methods based on...

In a recent report commissioned by the Norwegian government, a group of experts have presented a new framework for Norwegian competition analysis and policy, see von der Fehr, Norman, Reve and Ryssdal (1998). In conclusion, we believe the report represents a major contribution to the discussion...

Seasonality has been a major research area in economics for several decades. The paper assesses the recent development in the literature on the treatment of seasonality in economics, and divides it into three interrelated groups. The first group, Pure Noise Models, consists of methods based on...