3. monopoly arising from the size of monopoly, because some of the Affairs of the business must be very large in size in order to reduce production costs, low. (Economy of Scale), if the size is not large enough, and many will not be able to perform effectively. Make a large existing parties become monopoly implicitly. 4. a monopoly arising from monopoly, owns the key production factors, sole. Make other manufacturers cannot produce the item as long as it is not possible to find another alternative raw material inputs, and the owner of the production factors to become a monopoly in the production of goods. 5. the registration of copyright law. In countries with copyright laws protect the invention inventor will have a monopoly on the production of artifacts, it is equal to the lifetime of the copyright law.
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