Do you have any examples? I can't think of a single regulated monopoly that innovates effectively without outside forces.
For example some countries that have regulated monopolies can allow in small amounts of foreign products to motivate their own state sponsored companies, but without that and assuming its not something relatively straightforward like a utility or an oil company, I'm not aware of any that innovate effectively.
For example some countries that have regulated monopolies can allow in small amounts of foreign products to motivate their own state sponsored companies, but without that and assuming its not something relatively straightforward like a utility or an oil company, I'm not aware of any that innovate effectively.