| 21. | Planned obsolescence tends to work best when a producer has at least an oligopoly.
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| 22. | Their markets are mostly oligopoly with intensive competition.
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| 23. | Later, some market models were built using game theory, particularly regarding oligopolies.
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| 24. | Cut off from the world, big companies devoured each other, creating cumbersome oligopolies.
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| 25. | Within the world of policy, they form a very tight oligopoly at the top.
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| 26. | An oligopoly in waste will naturally extend itself over recycling and put the brakes on.
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| 27. | Eventually a few new oligopolies will emerge.
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| 28. | Enforcement of laws meant to curtail monopolies and oligopolies, including mergers of supermarket chains.
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| 29. | The Hollywood oligopoly replaced the Edison monopoly.
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| 30. | On the other side, people suspect collusion and blame oligopoly and lack of reinvestment.
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