So what exactly constitutes a "market"? And what is the magic "share" below which we should stop worrying? Comcast and AT&T have less than 50% of internet provider market in US, but even that causes all kinds of problems.
I was thinking mainly about software companies, as per the examples given in the XKCD hover text. Physical service providers like ISPs are a bit trickier to consider, as it is possible for a company with only 1% of the national market share to be a monopoly in a particular region. That's the problem with ISPs, local monopolies in some places.
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So what exactly constitutes a "market"? And what is the magic "share" below which we should stop worrying? Comcast and AT&T have less than 50% of internet provider market in US, but even that causes all kinds of problems.
I was thinking mainly about software companies, as per the examples given in the XKCD hover text. Physical service providers like ISPs are a bit trickier to consider, as it is possible for a company with only 1% of the national market share to be a monopoly in a particular region. That's the problem with ISPs, local monopolies in some places.