Comment by throwawaykf
11 years ago
Percentage of market share is not a clear indication of monopoly. From what I could find, 50% is typically the bare minimum to warrant consideration, and 70 - 75% will get more serious scrutiny. Also, it differs from country to country. In the UK, Tesco was investigated even though it had a market share of only 30%.
I also recall reading one of the EU's regulators (was it Joaquin Almunia?) say that (paraphrasing) "we start sniffing around when any one party gets a market share north of 60%." Unfortunately, I cannot find that article.
>Percentage of market share is not a clear indication of monopoly
True, and the reason is that a 30% UK-wide or a 50% Europe-wide market share can easily turn out to be a 100% market share in many local markets. Tesco defended itself by saying that 98% of consumers have access to five different super market chains within a drive time radius of 30 minutes. Make that a more realistic 10 minutes and the picture changes dramatically.