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Tidy Tidy
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9 years ago
A patent or copyright is a barrier to entry based on
A) ownership of a key necessary raw material.
B) large economies of scale as output increases.
C) government action to protect a producer.
D) widespread network externalities.
Textbook 
Essentials of Economics

Essentials of Economics


Edition: 4th
Authors:
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Repeat after me: 'Calm down. Things are gonna be fine. Things are gonna be all great. Just relax.' Wink Face
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VincenzoDVincenzoD
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9 years ago
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Tidy Author
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9 years ago
Good timing, thanks!
Liarec
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Yesterday
Brilliant ツ
jmelchor77
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2 hours ago
This site is awesome
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