Perhaps one can have the best of both worlds if one starts on a treadmill, but can jump off if one runs particularly fast – the system is competitive, but those who are particularly innovative secure some monopoly rents for a while. This is what a strong system of patent protection does.
或许你也可以同时享受两种结构的好处——从跑步机上开始，如果你跑得够快，可以跳出跑步机——系统是竞争性的，但特别长于创新者可以保证在一定时间内的垄断租。这就是强大的专利保护制度的特点。