Sometimes technology and policy changes really do have a big impact. Consider “teledensity,” measured for decades as the number of phone subscriptions for every 100 persons. Globally, teledensity rose until about 2005 globally, peaking about 2000 in the United States. Even at its peak, though, fixed network teledensity was less than 20 lines per 100 people.
The technology disruption was mobile phones and networks, which rapidly shifted demand away from consumer fixed services.
In 2020, there are about 8.3 billion mobile subscriptions in service, greater than world population. Mobile teledensity, in other words, is over 100 accounts per 100 people.
source: World Bank
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