100 firms is not a concentrated industry according to any economist’a definitions. However, this is a group of 100 or so firms in terms of “revenue extracted f

100 firms is not a concentrated industry according to any economist’a definitions. However, this is a group of 100 or so firms in terms of “revenue extracted from the ocean by these firms as a percentage of the total”. That is not a useful market definition. These firms are mostly not competitors (some subsets of them are in their separate markets!). Laying communications cable, shipping, fishing and oil and gas extraction are just four of the listed industries on this list of 100 companies. These four separate industries may be concentrated or not but this article doesn’t tell you one way or the other. (Source: Industrial Organization economist.)