About thirty years.
Well, a couple reasons. 1, their patents expired. 2, the natural economy of scale involved and the monopsony both dried up with new technology.
Lol...How many options for Cable television service does your house have? How many options for water? wastewater? Electricity? High fixed costs + low marginal costs = natural monopoly...even in a capitalist system.
Thanks for proving my points:
Business monopolies last only because of government laws.
no, many monopolies last because they are natural monopolies.
There are very few natural monopolies.
Well, i'll give you some credit here. you're learning. The above statement is a vast improvement over "there's no such thing as a monopoly without government legislation to that effect."
That should end any further comments from you on the subject.
Yes, after you've been prove wrong time and time again, I typically quit responding to your drivel. I'd hate to have you call me a hooker.
First you deny monopolies exist, you are proven wrong.
Then you deny they exist for very long, then you state that there are very few....