In some cases, markets:
All patents and copyrights:
A patent should cover a long enough period of time:
The benefits of technology spillovers:
In some cases, markets:
1. Can produce public goods.
All patents and copyrights:
4.Are scheduled to end someday.
A patent should cover a long enough period of time:
2.For the inventor to earn a good return.
The benefits of technology spillovers:
5.Are not shared equally.
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