• Policy design insights on patent duration and breadth, dynamic efficiency, and diffusion vs exclusion: optimal policy can push toward long life and wider claims under certain conditions; trade-offs shape licensing and market structure [9], [16], [1], [18].

• Cumulative knowledge and spillovers drive patent value and diffusion; early patents shape later innovations, with geographic localization of spillovers and domestic citation patterns; collaboration vs competition in R&D matters [2], [12], [17], [15].

• Licensing as strategic instrument in innovation: private incentives to license, preemption, and welfare effects; licensing outcomes depend on relative strengths and spillovers; important in sequential and duopolistic settings [10], [13], [6], [19], [5].

• Novelty, disclosure, and patent rights valuation influence innovation incentives; more stringent novelty increases disclosure and social welfare depends on rights allocation; empirical valuations and cross-country patterns [7], [3], [4], [14], [11].