Innovation and Imitation in a Duopoly
在双寡头市场中，一家企业拥有不可专利的创新想法时，创新预期利润与创新成本呈非单调关系；成本高的创新可能被采用，而成本低的反而不会。
In a duopoly where one firm has the idea for a non-patentable innovation, the expected profits from the innovation will not be a monotonic function of the cost of innovating. Furthermore, a costly innovation may be undertaken, where an inexpensive one would not have been, all other things being equal.